1.  Questions : Among D, F, J, P and A who reached office last ?
Statements : 

I.  F and J reached office together.
II. Only D and P reached office ahead of J.

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 E

Explanation:

From I and II, we conclude that only D and P reached office ahead of J and thus, F.

This implies that A reached last.

So, the data in both I and II together are required to answer the given question.