1.  KM5, IP8, GS11, EV14, ?

A. BX17
B. BY17
C. CY18
D. CZ17
E. CY17

Answer: Option E

Explanation:

The first letter of each term is moved two steps backward and the second letter is moved three steps forward to obtain the corresponding letters of the next term.

The number in each term is 3 more than that in the preceding term.