SSC CHSL 6 Mar 2018 Shift 3 Paper

Series : ENG, GQI, ITK, KWM, ?
The pattern followed in each letter of the terms is :
1st letter : E (+2 letters) = G (+2 letters) = I (+2 letters) = K (+2 letters) = M
2nd letter : N (+3 letters) = Q (+3 letters) = T (+3 letters) = W (+3 letters) = Z
3rd letter : G (+2 letters) = I (+2 letters) = K (+2 letters) = M (+2 letters) = O
Thus, missing term = MZO