Bide one's time means wait patiently for the right opportunity. 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: Bide one's time can refer to a situation involving wait patiently for the right opportunity.
• Story example: A writer may use Bide one's time when describing a situation involving wait patiently for the right opportunity.
• Exam example: When a sentence contains Bide one's time, choose the meaning “wait patiently for the right opportunity.”