Pointing to a photograph a woman says “ He is the only son of the daughter of my mother-in-law’s only son. How is the man related to woman?

Akhil is the maternal uncle of Rashmi. Ramesh is the father of Rashmi. How is Ramesh related to Akhil?

Pointing to a girl Sandeep said, "She is the daughter of the only sister of my father." How is sandeep related to the girl?

Introducing a boy Rahul says, "He is the son of the brother of the only daughter of my maternal grandfather". How is the boy related to the Rahul?

Pointing towards a woman, Amit said, "She is the sister of my wife's husband." How is the woman related to Amit?

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? 

P's father Q is B's paternal uncle and A's husband M is P's paternal uncle. How is A related to B ?