A sore point means a subject that makes someone upset or angry. This answer is correct because the expression has a fixed figurative meaning in English. In an SSC idiom question, students should match the whole phrase with its accepted meaning rather than translate each word separately.

• Classroom example: A sore point can refer to a subject that makes someone upset or angry.
• Story example: A writer may use A sore point when describing a subject that makes someone upset or angry.
• Exam example: When a sentence contains A sore point, choose the meaning “a subject that makes someone upset or angry.”