Which of the following terms will replace the question mark (?) in the given series to make it logically complete?

FUR37, LAX43, RGD49, XMJ55, ?

FUR37, LAX43, RGD49, XMJ55, ?

Logic: Each letter is increasing by 6 and also number is increasing by 6.

F+6=L, L+6=R, R+6=X, X+6=D

U+6=A, A+6=G, G+6=M, M+6=S

R+6=X, X+6=D, D+6=J, J+6=P

37+6=43, 43+6=49, 49+6=55, 55+6=61

So, missing term = DSP61

Thus, correct option is (c).