Amit and Sohan have two brothers Manju Sohan and Amit's sister who has a son Ravi. So tell me how is Ravi related to Amit?

Looking at one person, a woman said, "His brother's father is the only son of my grandfather." 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? 

Saloni is the daughter of the only son of Kartik. Nirupama is the mother of Deepak. Yamini’s only son, Ankit, is married to Nirupama. Kartik is the paternal grandfather of Deepak. How is Kartik related to Ankit?

A is B’s sister. C is B’s mother. D is C’s Father. E is D’s mother. Then how is A related to D?

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

Pointing to a boy, Roli said, ‘he is the son of my grandfather’s only son-in-law’. How is Roli related to that boy?

Introduction a boy, a girl said, "He is the son of the sister of my mother's brother." The girl has no real brother. How is that boy related to that girl?