If P is the husband of Q and R is the mother of S and Q. How is R related to P?

Vimal is the son of Mikka, and Nina is the daughter of Milan. Milan is the sister of Mikka. Who is Milan to Vimal? 

M is the son of P. Q is the granddaughter of O who is the husband of P. How is M related to O? 

Pointing to a girl in a photograph, Sunita said, "She is the mother of Renu, whose father is my son". How is she(Sunita) related to that girl?

Pointing to a man, a man said to a woman, "Your father's only daughter is his mother." How is the woman related to that person.

X and Y are brothers. R is the father of Y. S is the brother of T and maternal uncle of X. What is the T to R? 

Introducing A man, a woman said. He is the only son of my mother ' s mother. How is the woman related to the man?

Direction: Study the following information carefully and answer the questions given below:
Seven members are living in the family. Q is the daughter of P. B is the brother of R. G is the mother in law of A. B is married with A. B is the uncle of Q. D is the father of B.

What is the relation of B with respect to P?