Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
MNO, OPQ, QRS, ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. STU.
Given series: MNO, OPQ, QRS, ?
M + 2 = O, O + 2 = Q, Q + 2 = S
N + 2 = P, P + 2 = R, R + 2 = T
O + 2 = Q, Q + 2 = S, S + 2 = U