1.  Questions: Who among Siddhartha, Nikunj, Vipul, and Mukul is the youngest ?
Statements:

I.   Vipul is younger than Mukul but older than Siddhartha and Nikunj.
II.  Mukul is the oldest
III. Siddhartha is older than Nikunj.

A. Only I
B. Only I and II
C. Only II and III
D. Only I and III
E. None of these

Answer: Option D

Explanation:

From I, we have : M > V, V > S, V > N.

From II, we have : Mukul is the oldest.

From III, we have : S > N

Combining (i) and (iii), we get : M > V, V > S > N or M > V > S > N.

Clearly, Nikunj is the youngest.