Series Completion - Verbal and Reasoning

Directions to SolveIn each of the following questions, various terms of an alphabet series are given with one or more terms missing as shown by (?). Choose the missing terms out of the given alternatives.
Q1:

Y, B, T, G, O, ?

A N

B M

C L

D K

ANS:C - L

The given sequence is a combination of two series : I. Y,T, O and II. B, G, ? I consists of 2nd, 7th and 12th letters from the end of the English alphabet, while II consists of 2nd, 7th and 12th letters from the beginning of the English alphabet. So, the missing letter in II is the 12th letter from the beginning of the English alphabet, which is L.