Burn one's bridges means destroy one's chance of returning to a former situation. 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: Burn one's bridges can refer to a situation involving destroy one's chance of returning to a former situation.
• Story example: A writer may use Burn one's bridges when describing a situation involving destroy one's chance of returning to a former situation.
• Exam example: When a sentence contains Burn one's bridges, choose the meaning “destroy one's chance of returning to a former situation.”