Select the letter-cluster from among the given options that can replace the question mark (?) to complete the given series.

MSTS, LPUV, ?, JJWB, IGXE​​

Given: MSTS, LPUV, ?, JJWB, IGXE​​

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

For, 1st letter

M - 1 = L, L - 1 = K, K - 1 = J, J - 1 = I

For, 2nd letter

S - 3 = P, P - 3 = M, M - 3 = J, J - 3 = G

For, 3rd letter

T + 1 = U, U + 1 = V, V + 2 = W,W + 1 = X

For, 4th letter

S + 3 = V, V + 3 = Y, Y + 3 = B, B + 3 = E

So, the missing term is KMVY.

Thus, correct option is (c).