Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
KRA, IQZ, ?, EOX, CNW
KRA ==> (K-2) (R-1) (A-1) ==>Â IQZ
IQZÂ ==>Â (I-2)Â (Q-1)Â (Z-1)Â ==> GPY
GPYÂ ==> (G-2) (P-1) (Y-1)Â ==> EOX
EOXÂ ==> (E-2) (O-1) (X-1)Â ==> CNW
Hence 'GPY' will come in place of the question mark.
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