Fair and square means honestly and according to the rules. 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: Fair and square can refer to a situation involving honestly and according to the rules.
• Story example: A writer may use Fair and square when describing a situation involving honestly and according to the rules.
• Exam example: When a sentence contains Fair and square, choose the meaning “honestly and according to the rules.”