From pillar to post means from one place or person to another without success. 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: From pillar to post can refer to a situation involving from one place or person to another without success.
• Story example: A writer may use From pillar to post when describing a situation involving from one place or person to another without success.
• Exam example: When a sentence contains From pillar to post, choose the meaning “from one place or person to another without success.”