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

Concept:

In a family-relations puzzle, first fix each person's generation (using clues like grandson, aunt, uncle, brother-in-law) and gender, then read the asked relation off the constructed family tree. An “-in-law” relation always attaches through a marriage link — it is one step removed from the direct blood relation of the same base word (for example, a daughter-in-law is a son's wife, not one's own daughter).

Application:

1. Q is the daughter-in-law of K, so K has a son and that son's wife is Q. K and the son's mother form the first married couple; the son and Q form the second married couple. The puzzle fixes the whole family at exactly TWO married couples, and “no child has a single parent” means every child in this tree belongs to one of those two couples — so any child of the son and Q could become a parent in turn only by forming a THIRD couple, which the family does not have. This tree is therefore capped at exactly three generations: K's generation, the son's generation, and any children of the son and Q.

2. K is the brother-in-law of T, so T is the sibling of K's spouse — placing T in K's own generation.

3. T is the uncle of Y, so T's sibling (K's spouse) is a parent of Y. That makes Y a child of K and K's spouse, and a sibling of K's son.

4. Y is the aunt of S, so Y's sibling (K's son, married to Q) is a parent of S. S is therefore a child of K's son and Q, in the youngest generation.

5. O is the grandson of N. A grandson is always two generations below his grandparent, and step 1 fixed this tree at exactly three generations — so only a member of the OLDEST generation (K or K's spouse) can have a grandson; K's own son, being one generation below K, cannot have a grandson within this three-generation limit. All eight names denote eight distinct people, and K already carries his own separate label, so N cannot be K himself. N can therefore only be K's spouse.

6. With K, N, T, Y and Q now placed, the only unassigned name left is P, and the only role in the tree still without a name is K and N's son (Q's husband, parent of S) — so P must fill that role. “P is not the daughter of N” independently confirms P is male, consistent with being this son rather than a second daughter alongside Y.

7. N's only grandchildren, through her son P and Q, are S (already fixed in step 4) and O — so O is S's sibling. “S is not the brother of O” then confirms S is female, which fits the tree without contradiction.

Cross-check:

• Member count: K, N, T, Y, P, Q, S, O — exactly eight people, matching the given family size.

• Married-couple count: (K, N) and (P, Q) — exactly two couples, matching “two married couples.”

• “No child has a single parent” holds: Y and P (children of K and N) and S and O (children of P and Q) each have both parents present in the family.

Result:

Q is married to N's son (P), so by definition Q is N's daughter-in-law.