SSC CHSL Model Paper 10

A and B are children of D.
From (1), C is the brother B and son of E.
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. Therefore, D is the father of A.
Thus, (2) is sufficient to answer the question.