First and foremost means most importantly. 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: First and foremost can refer to a situation involving most importantly.
• Story example: A writer may use First and foremost when describing a situation involving most importantly.
• Exam example: When a sentence contains First and foremost, choose the meaning “most importantly.”