Which of the following letter-clusters will replace the question mark (?) in the given series?
PTXL, OSWK, NRVJ, ?, LPTH
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2, i.e., MQUI.
P - 1 = O, O - 1 = N, N - 1 = M, M - 1 =L
T - 1 = S, S - 1 = R, R -1 =Q, Q - 1 = P
X -1 =W, W - 1 = V, V - 1 = U, U - 1 = T
L - 1 = K, K - 1 = J, J - 1 = I, I - 1 = H