His boorish ways amused everyone.

Answer: Option A

Boorish: rough and bad-mannered; coarse.
Refined : elegant and cultured in appearance, manner, or taste.
Funny : causing laughter or amusement; humorous.
Eccentric : (of a person or their behaviour) unconventional and slightly strange.
Friendly : kind and pleasant.

Antonym of Boorish is Refined