1.  Question: How is R related to M ?
Statements:

I.  M's brother is husband of P.
II. P is mother of R's sister.

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 II, we conclude that P is R's mother. From I, we conclude that M is brother or sister of P's husband, who is also R's father. Thus, R is either nephew or niece of M.