In this type of questions, a series of single, pairs or groups of letters or combinations of letters and numerals are given. The terms of the series form a certain pattern as regards the position of the letter in the English alphabet. Find the missing or wrong term in series 

1)

M, N, O, L, R, I, V, ?


A) A

B) E

C) F

D) H

E) Z

Answer:

Option B

Explanation:

The given sequence is a combination of two series : I. M,O,R,V  and  II. N, L, I, ?

The pattern in I is : $M+2 \rightarrow O, O+3 \rightarrow R, R+4\rightarrow V$

The pattern in II is : $N-2 \rightarrow L, L-3 \rightarrow I, I-4 \rightarrow E$

So, the missing letter is E.