He is averse to the idea of holding elections now.

Answer: Option C

Convinced : completely certain about something.
Angry : feeling or showing strong annoyance, displeasure, or hostility; full of anger.
Opposed : anxious to prevent or put an end to; disagreeing with.
Indifferent : having no particular interest or sympathy; unconcerned.
Averse : having a strong dislike of or opposition to something.

Synonym of Averse is Opposed