Which letter cluster will replace the question mark (?) to complete the given series?
PFBR, MKUA, ?, GUGS, DZZB
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 3 i.e. JPNJ
P - 3 = M, M - 3 = J, J - 3 = G, G - 3 = D
F + 5 = K, K + 5 = P, P + 5 = U, U + 5 = Z
B - 7 = U, U - 7 = N, N - 7 = C, C - 7 = Z
R + 9 = A, A + 9 = J, J + 9 = S, S + 9 = B