He is gregarious, he is loner, he loves argument, he cannot bear to lose one.

Answer: Option D

Silent : not making or accompanied by any sound.
Talkative : fond of or given to talking.
Greedy : having an excessive desire or appetite for food.
Sociable : willing to talk and engage in activities with other people; friendly.
Gregarious : (of a person) fond of company; sociable.

Synonym of Gregarious is Sociable