Cross the line means go beyond acceptable limits. 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: Cross the line can refer to a situation involving go beyond acceptable limits.
• Story example: A writer may use Cross the line when describing a situation involving go beyond acceptable limits.
• Exam example: When a sentence contains Cross the line, choose the meaning “go beyond acceptable limits.”