If M is brother of N, B is brother of N and M is brother of D, then which one of the following statements is definitely true ?
N is brother of B
N is brother of M
N is brother of D
M is brother of B
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC CAPF – 2019
From “M is brother of N” and “B is brother of N”, we know that M and B are siblings of N.
From “M is brother of D”, we know that M is a sibling of D.
Since M is a sibling of N and also a sibling of D, N and D must also be siblings of M. Thus, M, N, B, and D are all siblings.
M and B are explicitly stated as brothers, meaning they are male. The genders of N and D are not explicitly stated.
Let’s examine the options:
A) N is brother of B: Not necessarily true, N could be female (sister).
B) N is brother of M: Not necessarily true, N could be female (sister).
C) N is brother of D: Not necessarily true, N could be female (sister).
D) M is brother of B: Since M and B are both siblings of N (M is brother of N, B is brother of N), they must be siblings of each other. M is stated as male (“brother”), so M is indeed the brother of B. This statement is definitely true.