Two persons are going. One is the father of the son of the other. What is the relationship between the two?

Madan's brother's uncle is Karan's father's brother. What can be the relationship between Madan and Karan?

B and C are siblings. M has two children and he is son of E, who is father-in-law of H. H has only one son. C is not granddaughter of E. How is H related to M?

If P is the mother of Q, R is the father of S, Q is the sister of S, and T is the son of R, then how is T related to Q?

If A is the father of B, C is the mother of D, B is the brother of C, and E is the son of D, then how is A related to E?

If A is the father of B, C is the mother of D, B is the brother of D, and E is the son of A, then how is E related to C?