Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
VDU, RGS, NJQ, ?, FPM

Given: VDU, RGS, NJQ, ?, FPM

Logic: 1st letter - 4, 2nd lette + 3 and 3rd letter - 2 place.

For, 1st letter

V - 4 = R, R - 4 = N, N - 4 = J, J - 4 = F

For, 2nd letter

D + 3 = G, G + 3 = J, J + 3 = M, M + 3 = P

For, 3rd letter

U - 2 = S, S - 2 = Q, Q - 2 = O, O - 2 = M

So, the missing term is JMO.

Thus, correct option is (d).