A good Samaritan means a kind person who helps someone in trouble. 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: A good Samaritan can refer to a kind person who helps someone in trouble.
• Story example: A writer may use A good Samaritan when describing a kind person who helps someone in trouble.
• Exam example: When a sentence contains A good Samaritan, choose the meaning “a kind person who helps someone in trouble.”