Get a foothold means obtain a first strong position. 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: Get a foothold can refer to a situation involving obtain a first strong position.
• Story example: A writer may use Get a foothold when describing a situation involving obtain a first strong position.
• Exam example: When a sentence contains Get a foothold, choose the meaning “obtain a first strong position.”