If an official takes legal action against a citizen due to personal enmity which principle is violated?

Correct answer: Fair use of public power

Direct answer: Option A, fair use of public power. An official receives authority from the state to apply law for public purposes, not to take revenge or settle a personal quarrel. Reasoning: there is an official action; the action is legal in form; the real reason is personal enmity; public authority has therefore been converted into private revenge; this violates impartial and fair use of public power. Option A is correct because it requires officials to act objectively and for lawful public reasons. Option B is wrong because election expenditure limits concern campaign money. Option C is wrong because voter registration concerns enrolling eligible voters. Option D is wrong because manifesto writing concerns a party’s election promises. The important lesson is that even a powerful official must use office for public duty, follow fair procedure, and avoid personal bias. Remember: government power is a public trust, not a personal weapon.