Verbal Reasoning - Mental Ability Questions

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
MN_O_NN_M_NO

Dharun has a brother Anand. Dharun is the son of Kumar. Krishnan is Kumar's father. How is Anand related to Krishnan?

If A=1, CAT=60, then MAN=?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
BT, DR, FP, ?

Select the related word from the given alternatives.
Plane : Pilot :: Ship : ?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

9, 17, 44, 108, 233, ?

Pointing towards a lady in a photograph, Ram says, "Her mother is the mother­in­law of my father's brother". How is the lady related to Ram?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

AB, BC, CD, DE, EF ?