নিচের কোনটি কার্বক্সিল মূলকের সংকেত?

A -COOH

B -CHO

C -OH

D -NH2

Correct Answer & Explanation

Option A

Option A is the correct answer according to official curriculum guidelines.

Take our full-length timed CBT Mock Test with 100 questions, live rank leaderboard and negative marking.

Premier online learning portal for ANM GNM, WBPSC, and competitive exams in West Bengal.

Designed for optimal performance and Google Search ranking across West Bengal.