Could someone solve this analogy?
droll : amusing :: sardonic : ________
P.S. the answer does not have to be a specific length.
Since we do not have any options here, I would nominate mocking as the best answer.
Pleasing or satisfying.
The primary definition of "sardonic" is "mocking," or "cynical." Since we need an adjective here, those would be the obvious go-to choices. Another possibility would be "praising," but that's a stretch.