Direction: Read the following information carefully and answer the questions…

Concept

In blood-relation puzzles of this kind — the standard competitive-exam convention these questions are set and keyed against — a plain kinship word (uncle, aunt, grandson, …) is read as a BLOOD relation unless the puzzle marks a marriage link explicitly, either with an "-in-law" suffix (as it does here for K, called T's "brother-in-law", never T's "brother") or by separately stating a marriage. "Uncle" therefore means a parent's own brother — elder or younger, or the mother's brother — one generation above the niece/nephew; "aunt" is the parallel parent's-sister reading; "daughter-in-law" is a son's wife (explicitly NOT a blood child, by the very same convention); and "grandson" spans two generations down from a grandparent, through EITHER a son or a daughter (English does not distinguish the two descent lines, so neither should the reading of the clue, until the derivation itself pins one down). Solving means placing every named person into a generation and a marital pair using these fixed gaps — never assigning an already-fixed letter to a role that contradicts its fixed status (a daughter-in-law, for instance, cannot also be a blood child) — checking that the eight letters can actually supply every required person without running short or over, and then checking the whole tree against the stated constraints.

Application

1. T is the uncle of Y (plain term, so a blood relation, per the Concept), meaning Y's parent — call this person M — is T's own brother or sister: place T in Gen-1, M in Gen-1, and Y in Gen-2. M is not T (a person is not their own sibling).

2. Y is the aunt of S, so S's parent is Y's sibling: Y's sibling is in Gen-2 (same level as Y), and S is in Gen-3.

3. K is the brother-in-law of T — a marriage link, with two possible readings: (a) K marries M, T's sibling, or (b) K is the brother of T's OWN wife, which would require T to have a separate wife of his own (call her T-wife). T-wife cannot be M (a person cannot marry their own sibling), so reading (b) needs T-wife as a further NEW Gen-1 person on top of M — one more than reading (a), which needs no extra person beyond M (K marrying M is itself the brother-in-law link). As the letter-count in step 5 shows, the budget is already exactly used up by M and one shared Gen-2 son under reading (a); reading (b)'s extra person leaves nothing at all for O's own Gen-3 placement (step 6). So reading (b) is impossible: K marries M. K is in Gen-1, and K is not M (K relates to T only by marriage; M is T's blood sibling).

4. Q is the daughter-in-law of K, so K has a married son in Gen-2; since every child needs both parents, K needs a Gen-1 wife. Separately, M also needs a Gen-1 spouse, for Y to have both parents — and step 3 has already identified that spouse as K himself.

5. Counting check — is K's son the same person as Y's sibling? Only five people are fixed so far (T, K, Y, S, Q), leaving three letters (N, O, P) in the whole family. Could an already-fixed letter fill the "Y's sibling" role instead of a fresh one? T, K, and Y sit at the wrong generation (Gen-1, Gen-1, and Y herself); S is one generation too low (Gen-3, not Gen-2); and Q cannot be Y's sibling either — Q is fixed as K's DAUGHTER-IN-LAW (married in), which is mutually exclusive with being K and M's own blood child, since that would make Q simultaneously her husband's wife and his sister. So Y's sibling, if a different person from K's son, would need its own fresh letter, on top of the fresh letter M already uses — two fresh letters just for Gen-1/Gen-2, leaving only one for O's clue (step 6), which needs a person exactly two generations below another; no such gap exists between only Gen-1 and Gen-2, so a lone leftover letter cannot satisfy it. Hence K's son must BE Y's sibling — the very same person is M's son, Y's sibling, S's parent, and Q's husband. This uses exactly two of the three remaining letters (one for M, one for that shared son), leaving exactly one letter still unplaced.

6. O is the grandson of N, so N and O must sit exactly two generations apart, N the elder. Of the three remaining letters, two are now placed — M (Gen-1) and the shared son (Gen-2) — leaving one unplaced. Testing every way to assign the literal letters N and O among these three slots: only N = M and O = the unplaced letter (set as a Gen-3 child of the shared son and Q, a sibling of S) gives a clean two-generation gap; every other assignment gives zero, one, or a negative gap. So N is M — K's wife, and, via K's brother-in-law link to T (step 3), also T's sister — and O is that Gen-3 child.

7. The one remaining letter is P, which must be the shared son: K and N's son, husband of Q, and father of S and O — specifically N's SON's son, matching "P is not the daughter of N" (P is N's son, not daughter).

8. S is not the brother of O: since S and O share both parents (P and Q, step 7), S must be female — O's sister, not his brother.

9. Couple-count and completeness check: K & N (Gen-1) and P & Q (Gen-2) are the only two married couples among the eight members, and every child — P, Y, S, and O — has both parents present, matching the stated constraints exactly.

Cross-check

• K is the brother-in-law of T — K is married to N, and T is N's brother, so K and T are linked by marriage. Holds.

• T is the uncle of Y — T is N's brother, and Y is N's daughter, so T is Y's maternal uncle. Holds.

• Y is the aunt of S — Y is P's sister, and S is P's daughter, so Y is S's paternal aunt. Holds.

• Q is the daughter-in-law of K — Q is married to P, K's son. Holds.

• O is the grandson of N — specifically N's son's son, since O is P's son and P is N's son — exactly two generations below N. Holds.

• P is not the daughter of N — P is N's son. Holds.

• S is not the brother of O — S is female, O's sister. Holds.

• Exactly two married couples (K–N and P–Q) among the eight members (K, N, T, Y, P, Q, S, O), and every child (P, Y, S, O) has both parents present. Holds.

• Uniqueness: step 3 rules out K being T's wife's brother (that reading needs an extra person the letter budget cannot afford); step 5 rules out Y's sibling being anyone but K's own son — every already-fixed letter is either the wrong generation or, for Q, definitionally excluded (a daughter-in-law cannot be a blood child); step 6's check of every possible N/O placement then admits only one that gives the required two-generation gap. No other assignment of the eight names satisfies all seven clues together, so this tree is the only one that fits.

Result

Statement A — "N is the mother of Y": N is Y's mother, so this statement is correct, not incorrect.

Statement B — "S is the daughter of P": S is P's daughter, so this statement is correct, not incorrect.

Statement C — "T is the husband of N": T is N's brother, not her husband — N's husband is K — so this statement is incorrect.

Since only statement C fails to hold, the correct choice is "Only C".