Question:আগুন নেভানোর কাজে কোন গ্যাসটি ব্যবহৃত হয়? 

A `H_2` 
B `N_2` 
C `CO_2` 
D `SO_2` 

+ Answer
C 

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Md. Sohel Arman

Editor, VCampus

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