Discussion of Question with ID = 052 under Data-Sufficiency

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Question

The following question consists of a question followed by two statements labeled I and II. You have to decide whether the data given in the statement (s) is /are sufficient for answering the question.

D is the sister of C. How is D related to A?

1. A is the sister of B.
2. B is the brother of C.
A

if data in statement I alone are sufficient to answer the question while the data in statement II alone are not sufficient to answer the question.

B

if data in statement II alone are sufficient to answer the question, while the data in statement I alone are not sufficient to answer the question.

C

if data either in statement I alone or in the statement II alone are sufficient to answer the question.

D

if data in both the statements I and II together are needed to answer the question.

Soln.
Ans: d

With the help of statement I and II, it is clear that all the persons A, B, C, D are brothers and sister of one another and D is sister of A.