Fit as a fiddle means very healthy and strong. 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: Fit as a fiddle can refer to a situation involving very healthy and strong.
• Story example: A writer may use Fit as a fiddle when describing a situation involving very healthy and strong.
• Exam example: When a sentence contains Fit as a fiddle, choose the meaning “very healthy and strong.”