Correct option is A
Given: RK Narayan : Novel :: R K Laxman : ?
RK Narayan : Novel → RK Narayan was a famous novelist.
R K Laxman : ? → R K Laxman was a famous cartoonist.
Checking Options:
(a) Cartoon → R K Laxman was known for his political and social cartoons.
R K Laxman : ? → R K Laxman was a famous cartoonist.
Checking Options:
(a) Cartoon → R K Laxman was known for his political and social cartoons.
Thus, the correct option is (a) Cartoon