ACDFGIJLMOP?
From Alphabet Series · Verbal Reasoning
CDE, IJK, NOP, ?
SFJ, RGK, QHL, ?
FAG, GAF, HAI, IAH, ?
DWEV, FUGT, HSIR, ?
ADG, GJM, MPS, ?
T, R, P, N, L, ?, ?
SCD, TEF, UGH, ? , WKL
AZ, CX, FU, ?