Each of the questions given below consists of a statement and/or a question…
2024
Each of the questions given below consists of a statement and/or a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statement(s) is/are sufficient to answer the given question.
Read both the statements and Give answer
How is A related to B?
Statement I.
B is the brother of A
Statement II.
C is the wife of A
- A.
if the data in Statement I alone is sufficient to answer the question, while the data in Statement II alone is not sufficient to answer the question.
- B.
if the data in Statement II alone is sufficient to answer the question, while the data in Statement I alone is not sufficient to answer the question.
- C.
if the data in each Statement I and Statement II alone is sufficient to answer the question.
- D.
if the data in both Statements I and II together are necessary to answer the question.
Show answer & explanation
Correct answer: D
Concept: In a family-relation data-sufficiency question, a statement is sufficient only when it fixes every unknown the question needs — normally the gender of each named person plus the link between them. A sibling term (brother/sister) fixes the gender of the person it describes but not of the person it is linked to; a spouse term (husband/wife) fixes the gender of the person who has that spouse but adds no new link to a third person.
Application: Statement I says B is the brother of A — this fixes B as male and tells us B is A's sibling, but A's own gender stays unknown, so we cannot yet say whether A is B's brother or sister. Statement II says C is the wife of A — this fixes A as male, but it says nothing at all about B. Combining the two: A is male (Statement II) and A is B's sibling (Statement I), so A must be B's brother.
Contrast:
Statement I alone is sufficient, Statement II is not: fails — Statement I alone leaves A's gender open, so the exact relation to B is not fixed.
Statement II alone is sufficient, Statement I is not: fails — Statement II alone fixes only A's gender and says nothing that links A to B.
Each statement alone is sufficient: fails — by the same two gaps above, neither statement is adequate by itself.
Both statements together are necessary: holds — only the combination closes both gaps (A's gender and the sibling link), fixing the relation uniquely.