Series : UPY, QLU, MHQ, IDM, ? The pattern followed in each letter of the terms is : 1st letter : U (-4 letters) = Q (-4 letters) = M (-4 letters) = I (-4 letters) = E 2nd letter : P (-4 letters) = L (-4 letters) = H (-4 letters) = D (-4 letters) = Z 3rd letter : Y (-4 letters) = U (-4 letters) = Q (-4 letters) = M (-4 letters) = I Thus, missing term = EZI => Ans - (C)