1.  Questions : What is Nitin's rank  from the top in a class of forty  students ?
Statements : 

I.  There are ten students between Nitin and Deepak.
II. Deeapak is twentieth from the top.

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:

Since there are ten students between Nitin and Deepak, so Nitin may be eleven ranks above or below Deepak. Thus, Nitin may be 9th or 31st from the top.