একজন সুস্থ মহিলার রজঃচক্রের (Menstrual Cycle) গড় সময়কাল কত?

A 7 দিন

B 28 দিন

C 14 দিন

D 40 দিন

Correct Answer & Explanation

Option B

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

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