Which letter-cluster will replace the question mark (?) in the following series?
BZD, DXF, GUI, ?, PLR
The difference between first letters = D-B = 2 , G-D = 3 => next differences should be 4 and next 5. Hence the first letter is K
The difference between last digits =F-D = 2 , I-F = 3 =>Â Â next differences should be 4 and next 5. Hence the last letter is M
The only option satisfying condition satisfying the above condition is C
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