What is 'Apple of discord'?

Explanation: The phrase 'Apple of discord' refers to something that causes strife, disagreement, or conflict. This originates from Greek mythology, where Eris, the goddess of strife, threw a golden apple marked 'For the fairest' among the goddesses, leading to discord. Option D 'Uncouth' aligns with the sense of conflict as it represents a lack of refinement or civility, indirectly pointing to discord. The other options—Option A: 'Rural', Option B: 'Shave', and Option C: 'Sophisticated'—do not convey the idea of discord or conflict.