What is a by-election?
- A An election held to fill a single seat that has become vacant ✓ Correct
- B A general election for the whole country
- C A vote to choose the monarch
- D An election only in Scotland
✅ Correct answer: A — An election held to fill a single seat that has become vacant
💡 Explanation
A by-election is held in a constituency when a sitting MP dies or resigns between general elections.