An olive branch means an offer of peace. 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: An olive branch can refer to an offer of peace.
• Story example: A writer may use An olive branch when describing an offer of peace.
• Exam example: When a sentence contains An olive branch, choose the meaning “an offer of peace.”