Question:বাতাসের দুটি অণুর মধ্যকার দূরত্ব কত? 

A 0.0000001 m 
B 0.00000001 m 
C 0.00000000m 
D 0.000000001 m 

+ Answer
B 

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Md. Sohel Arman

Editor, VCampus

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