Question

Nice : unkind :: ____ :___

a. ugly : pretty
b. safe : solid
c. loud : noisy
d. terrible : awful

Answer 1

a. ugly : pretty would fit best

Answer 2

a. ugly : pretty

Step-by-step explanation:

Though subjective, this analogy(?) is gunning for antonyms. So, a. is the only answer that makes sense here.