Select the option that is related to the third letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster.
KRY : NWR :: PBX : ?
KRY : NWR
KRY ==> (K+3) (R+5) (Y-7)Â ==>Â NWR
PBX : ?
PBXÂ ==>Â (P+3) (B+5) (X-7) ==> SGQ
Hence 'SGQ' will come in place of the question mark.
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