Question
Select the letter-cluster from among the given options
that can replace the question mark (?) in the following series. CFI, HJL, MNO, RRR, ?Solution
Given: CFI, HJL, MNO, RRR, ? 
Logic: 1st letter + 5, 2nd letter + 4 and 3rd letter + 3 place. For, 1st letter C + 5 → H, H + 5 → M, M + 5 → R, R + 5 → W For, 2nd letter F + 4 → J, J + 4 → N, N + 4 → R, R + 4 → V For, 3rd letter I + 3 → L, L + 3 → O, O + 3 → R, R + 3 → U So, the missing term is WVU. Thus, correct option is (a).
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