Fish in troubled waters means try to gain advantage from a confused 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: Fish in troubled waters can refer to a situation involving try to gain advantage from a confused situation.
• Story example: A writer may use Fish in troubled waters when describing a situation involving try to gain advantage from a confused situation.
• Exam example: When a sentence contains Fish in troubled waters, choose the meaning “try to gain advantage from a confused situation.”