Select the letter-cluster that can replace the question mark (?) in the following series.EQM, GRL, ISK, KTJ, ?

Select the letter-cluster that can replace the question mark (?) in th

1.	Select the letter-cluster that can replace the question mark (?) in the following series.EQM, GRL, ISK, KTJ, ?
A.	MUI
B.	NUS
C.	MTJ
D.	MVR
Answer» B. NUS