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Blood Relation Test - Verbal and Reasoning

Q1:

A and B are children of D. Who is the father of A? To answer this question which of the statements (1) and (2) is necessary?
  1. C is the brother of A and the son of E.
  2. F is the mother B.

A Only (1)

B Only (2)

C Either (1) or (2)

D (1) and (2) both

ANS:B - Only (2)

Explanation: A and B are children of D. From (1), C is the brother B and son of E. Since, the sex of D and E are not known. Hence (1) is not sufficient to answer the question. From (2). F is the mother of B. Hence, F is also the mother of A. Hence D is the father of A. Thus, (2) is sufficient to answer the question.