ক্ষারীয় দ্রবণে ফেনলফথ্যালিন সূচকের বর্ণ কী হয়?

A গোলাপী

B বর্ণহীন

C হলুদ

D নীল

Correct Answer & Explanation

Option A

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

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