Concept:An antonym is a word opposite in meaning. The correct prefix for ‘justice’ to form its opposite is ‘in-’.Explanation:The word ‘justice’ means fairness and righteousness. Its opposite is ‘injustice’, which means lack of justice or unfairness. The other options — ‘disjustice’, ‘illjustice’, and ‘unjustice’ — are not standard English words. Only ‘injustice’ is correct. Therefore, the antonym of ‘justice’ is ‘injustice’.Answer:Option A: Injustice