Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
RAT, UEY, XID, ?, DQN
RAT ==>Â (R+3) (A+4)Â (T+5) ==> UEY
UEYÂ ==> (U+3) (E+4) (Y+5) ==> XID
XID ==> (X+3) (I+4) (D+5) ==> AMI
AMIÂ ==> (A+3) (M+4) (I+5) ==> DQN
So 'AMI' will come in place of the question mark.
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