1.  Statement : Use PVC pipes which have 10 years longer life to any other.
Assumptions :

I. People prefer only those pipes which are durable.
II. Other Pipes are not durable.
A. If only assumption I is implicit
B. If only assumption II is implicit
C. If either I or II is implicit
D. If neither I nor II is implicit
E. If both I and II are implicit

Answer: Option B

Explanation:

Clearly, nothing is mentioned about the choice of people. It is simply an advice. So, I is not implicit. Clearly, the other pipes are not as durable as the PVC pipes. So, II is implicit.