QYK, ?, ISG, EPE
From Alphabet Series · Verbal Reasoning
DWEV, FUGT, HSIR, ?
SFJ, RGK, QHL, ?
ADGJ, YVSP, KNQT, ?
AZ, CX, FU, ?
Y, S, U, O, Q, ??
CDE, IJK, NOP, ?
ACE, GJI, MQM, ?
a, c, f, j, ?, ?