Question

which word is a synonym of nonchalant?
unconcerned
numb
popular
sophisticated

Explanation:

"Nonchalant" means showing a lack of concern or interest. "Unconcerned" also implies not being worried or interested, making it a synonym. "Numb" refers to a lack of physical or emotional feeling, "popular" means well - liked, and "sophisticated" means cultured or complex, none of which are synonyms of "nonchalant".

Answer:

A. unconcerned