Drop in the bucket means a very small amount compared with what is needed. 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: Drop in the bucket can refer to a very small amount compared with what is needed.
• Story example: A writer may use Drop in the bucket when describing a very small amount compared with what is needed.
• Exam example: When a sentence contains Drop in the bucket, choose the meaning “a very small amount compared with what is needed.”