Blood Relation Test - Verbal and Reasoning

Q1:

If D is the brother of B, how B is related to C? To answer this question which of the statements is/are necessary?
  1. The son of D is the grandson of C.
  2. B is the sister of D.

A Only 1

B Only 2

C Either 1 or 2

D 1 and 2 both are required

ANS:D - 1 and 2 both are required

Explanation: Given: D is the brother of B. From statement 1, we can detect that D is son of C (son of D is the grandson of C). From statement 2, we can detect that B is 'Female' (sister of D). Therefore, B is daughter of C.