Question

A is the brother of B. A is the brother of C. To find what is the relation between B and C, what minimum information from the following is necessary?
(i) Gender of C
(ii) Gender of B

• A. Only (i)
• B. Only (ii)
• C. Either (i) or (ii)
• D. Both (i) and (ii)
• E. None of these

Answer 1

The correct option is D Both (i) and (ii)

Without knowing the sex of C, we can't determine whether B is the sister of C or B is the brother of C. Similarly without knowing the sex of B we can't determine whether C is the sister of B or C is the brother of B. Therefore, both (i) and (ii) are necessary.