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Which of the given letter-number clusters will replace the question mark (?) in the following series to make it logically complete? SWD 9, HLS 12, WA
Question

Which of the given letter-number clusters will replace the question mark (?) in the following series to make it logically complete?
SWD 9, HLS 12, WAH 16, LPW 21, ?

A.

CIK 30

B.

KDT 27

C.

AKM 32

D.

AEL 27

Correct option is D

Information Given:
Series: SWD 9, HLS 12, WAH 16, LPW 21, ?
Logic: ​Letters move +15 cyclically; numbers increase by +3, +4, +5, +6.​
Explanation:
1st letter: S+15 → H+15 → W+15 → L+15 → A
2nd letter: W+15 → L+15 → A+15 → P+15 → E
3rd letter: D+15 → S+15 → H+15 → W+15 → L
Number: 9+3 → 12+4 → 16+5 → 21+6 → 27
Final Answer:
AEL 27
Final Correct Option:
D) AEL 27

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