Which of the following letter-number groups will logically complete the given series in place of the question mark (?)?
ZSL 18, VOH 29, RKD 40, NGZ 51, JCV 62, ?

Correct option is D

Information Given:
Series:
ZSL 18, VOH 29, RKD 40, NGZ 51, JCV 62, ?

Logic:
Letters decrease by −4 each step; numbers increase by +11.

Explanation:
Logic: Apply −4 shift to each letter and +11 to numbers.

Numbers:
18 → 29 → 40 → 51 → 62 → 73

Letters:

1st letters:
Z → V → R → N → J → F (−4)

2nd letters:
S → O → K → G → C → Y (−4)

3rd letters:
L → H → D → Z → V → R (−4)

So next term → FYR 73

Final Answer:
FYR 73

Final Correct Option:
D