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)

Find the next two term in the series: A, C, F, J, ?, ?


A) L,P

B) M, O

C) O, U

D) R, V

Answer:

Option C

Explanation:

Clearly, the first, second, third, ... letters of the series are respectively moved two, three, four, .. steps forward to obtain the successive terms of the series. Thus the fifth term in the series must be a letter which is five steps ahead of J ie., O. While the sixth term of the series must be a letter six steps ahead of O ie., U.

Hence the answer is O, U ie., (c).