In a family, there are six members A, B, C, D, E and F. 

A and B are a married couple, A being the male member. D is the only son of C, who is the brother of A. E is the sister of D. B is the daughter-in-law of F, whose husband has died. How is F related to C ? 

Pointing at X, Y says, "X is the son of the only son of my mother". Then Y is X's ___.

If 'U' is the husband of 'V', 'V' and 'W' are daughters of 'X', 'Y' is the husband of 'X', then 'Y' is the ____ of 'U'.

Malini said, "Rohit is my maternal aunt's mother's only son's son". How is Malini related to Rohit?

How is Sameer related to Akbar if Sameer introduced Akbar as his maternal grandmother's only son's son?

Ram said , "Sita is my paternal great grandfather's only son's only daughter-in-law". How is Sita related to Ram?

P is the brother of Q. Q is the brother of R. P is the son of S. Based these three statements, much of the following statements cannot be definitely true?

Rajat is the brother of Sanjay and Manish is the father of Rajat. Jay is the brother of Shreya and Shreya is the daughter of Sanjay. Who is the uncle of Jay?

R is P's father's nephew. Sis P's cousin but not the brother of R. How is S related to R?