Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
CB_W V_SP _NLI HG_B A_XU

Correct option is D

Given: CB_W V_SP _NLI HG_B A_XU
(a) XUOFY
CB XW V USP ONLI HG F B A YXU (sequence not followed)
(b) XUOEZ
CB XW V USP ONLI HG EB A ZXU (sequence not followed)
(c) XUOEY
CB XW V USP ONLI HG EB A YXU (sequence not followed)
(d) ZUOEZ
CB ZW V USP ONLI HG EB A ZXU ( Sequence followed- Pattern: Each subsequent term is reduced by -1, -2, -3.)