A. Humble
B. Cowardly
C. Egotistic
D. Gentlemanly
Arrogant : Having or revealing an exaggerated sense of one’s own importance or ability.
Humble : Having or showing a modest or low estimate of one’s importance.
Cowardly : Lacking courage.
Egoistic : Having exaggerated self importance.
Gentlemanly : Chivalrous, courteous.
Antonym of Arrogant is Humble.