Verbal Reasoning - Mental Ability Questions

B is the brother of A and E is the brother of D. If D is the father of B then how E and A are related?

There are six persons A, B, C, D E and F. C is the sister of F. B is the brother of E's husband. D is the father of A and grandfather of F. There are two fathers, three brothers and a mother in the group. Who is E's husband ? 

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?

Hill : Mountain :: Stream : ____

In which of the following pairs,second person is to  the immediate right of the first person ?

Ramesh, Kamal, Mohit, Amit and Rohit are standing in a row in the order of their heights. Ramesh is shorter than Kamal but taller than Rohit. Mohit is the tallest. Amit is a little shorter than Kamal but little taller than Ramesh. Who is the shortest?

Choose the word which is least like the others word in a group?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
DK, FN, HQ, ?