What should come in the place of the question mark (?) in the following alphanumeric series?
A1X, B4P, E25J, J100F, ?

Correct option is C

The pattern is: 1st letter +1, +3, +5, +7(A, B, E, J), 2nd number is square of place value of 1^st letter (1, 4, 25, 100) and pattern in 3rd letter -8, -6, -4, -2 (X, P, J, F). Thus, the next triplet is Q289D.