a_x_am_namxn_mx _

Directions: Which word will come in the middle if all of them are arranged alphabetically as in a dictionary?
A. Heaven        B. Hillock         C. Hawker         D. Hilt         E. History

CFL, EIK, GLJ, IOI, ? 

How many pairs of letters are there in the word ‘CAMARADERIE’ which have as many letters between them as they have between them in the English alphabet?

oru_o_uxor_x_rux 

Direction: Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it.
ab_bba _ _bba _abb _ _a 

Direction: What should come in place of the questions mark (?) in the following letter series?
reoc, pgme, nikg, Ikii, ?