What should come in place of the question mark (?) in the given series based on the English alphabetical order?
ICD, MGH, QKL, UOP, ?

Given: ICD, MGH, QKL, UOP, ?

Logic: Each letter increased by +4 places in English alphabet.

1st letters: I + 4 = M; M + 4 = Q; Q + 4 = U; U + 4 = Y
2nd letters: C + 4 = G; G + 4 = K; K + 4 = O; O + 4 = S
3rd letters: D + 4 = H; H + 4 = L; L + 4 = P; P + 4 = T
So, missing term is  YST.

Thus, the correct option is (b) YST.