Antonym of BOISTEROUS

Answer: Option A

Boisterous : noisy, energetic, and cheerful.
Calm : not showing or feeling nervousness, anger, or other strong emotions.
Comfortable : (especially of clothes or furnishings) providing physical ease and relaxation.
Good : to be desired or approved of.
Happy : feeling or showing pleasure or contentment.

Antonym of Boisterous is Calm