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Data Sufficiency - Verbal and Reasoning

Q1:

Question: Manoj, Prabhakar, Akash and Kamal are four friends. Who among them is the heaviest ? Statements:
  1. Prabhakar is heavier than Manoj and Kamal but lighter than Akash.
  2. Manoj is lighter than Prabhakar and Akash but heavier than Kamal.

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

ANS:A - I alone is sufficient while II alone is not sufficient

Explanation: From I, we have: P > M, P > K, A > P. Thus, A > P > M > K or A > P > K > M. So, Akash is the heaviest. From II, we have: P > M, A > M, M > K. Thus, A > P > M > K or P > A > M > K. So, either Akash or Prabhakar is the heaviest.