The passing of the bill was followed by a large scale retaliation by the citizens.

Answer: Option B

Retaliation : the action of returning a military attack; counter-attack.
Procreation : the production of offspring; reproduction.
Reconciliation : the restoration of friendly relations.
Conciliation : the action of stopping someone being angry; placation.
Redressal : remedy or compensation for a wrong or grievance.

Antonym of Retaliation is Reconciliation