Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
XJL, YGM, ZDN, ?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. AAO.
Given series: XJL, YGM, ZDN, ?
X + 1 = Y, Y + 1 = Z, Z + 1 = A
J - 3 = G, G - 3 = D, D - 3 = A
L + 1 = M, M + 1 = N, N + 1 = O