Question:কোষ কত সালে আবিষ্কৃত হয়? 

A ১৮৬৫ 
B ১৭৬৫ 
C ১৬৬৫ 
D ১৫৬৫ 

+ Answer
C 

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Md. Sohel Arman

Editor, VCampus

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