He is known for his uncouth manners.

Answer: Option A

Uncouth : lacking good manners, refinement, or grace.
Courteous : polite, respectful, or considerate in manner.
Usual : habitually or typically occurring or done; customary.
Petty : of little importance; trivial.
Mean : intend to convey or refer to (a particular thing); signify.

Antonym of Uncouth is Courteous