Madhya Pradesh Police Exam Model Paper 3

The logic follows here is :-

According to the Alphabetic order the series follows here is :

First letter in the series the logic follows here is :

C = 3

C + 3 = F

F + 3 = I

I + 3 = L

L + 3 = O

O + 3 = R

∴Second letter is opposite letter of First letter from the Alphabetic order.

Thus, the correct answer is 'RI'.