Based on the English alphabetical order, three of the following four letter cluster pairs are alike in a certain way and thus form a group. Which is the one that does not belong to that group?

Meena is the wife of Nandu. Nandu is the father of Ovi. Ovi is the sister of Prakash. Prakash is the father of Sunita. Sunita is the wife of Rohan. How is Meena related to Rohan?

K is the sister of L. L is the father of M. M is the son of N. N is the mother of O. O is the wife of P. P is the father of Q. How is L related to Q?

Based on the above, how is N related to T if 'N # V x G % R+T' ?

In a certain code language:

Based on the above, how is Z related to F if Z + L # M @ T - F?