Question

which word is a synonym of nonchalant? unconcerned sophisticated numb

Explanation:

To determine the synonym of "nonchalant", we analyze the meanings: "nonchalant" means relaxed and not showing concern. "unconcerned" also means not concerned or worried, matching the meaning. "sophisticated" refers to being refined or complex, and "numb" means lacking sensation or emotion, so they don't match.

Answer:

A. unconcerned