There has been considerable furore both within Parliament and without about the proposed hike in tele-communication tariff.

Answer: Option C

Opposition : resistance or dissent, expressed in action or argument.
Criticism : the expression of disapproval of someone or something on the basis of perceived faults or mistakes.
Uproar : a public expression of protest or outrage.
Disagreement : lack of consensus or approval.
Furore : an outbreak of public anger or excitement.

Synonym of Furore is Uproar