Which letter cluster from the options will replace the question mark (?) to complete the given series?JSE, MLG, PEI, SXK, ?

Which letter cluster from the options will replace the question mark (

1.	Which letter cluster from the options will replace the question mark (?) to complete the given series?JSE, MLG, PEI, SXK, ?
A.	USM
B.	VSM
C.	VQM
D.	URM
Answer» D. URM