1.  Question: Who among P, Q, R, S and T is the highest ?
Statements:

I.  R is heavier than Q and T but lighter than S.
II. S is not the heaviest.

A. I alone is sufficient while II alone is not sufficient
B. II alone is sufficient while I alone is not sufficient
C. Either I or II is sufficient
D. Neither I nor II is sufficient
E. Both I and II are sufficient

Answer: Option D

Explanation:

From I, we have : R > Q, R > T, S > R i.e. S > R > Q > T or S > R > T > Q. From II, S is not the heaviest. So, P is the heaviest. Thus, we have : P > S > R > Q > T or P > S > R > T > Q Hence, either T or Q is the lightest.