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                              Q:
                           
                           
                                                      | A) Nitrogen | B) Argon | 
| C) Oxygen | D) Helium | 
                              Answer:   A) Nitrogen
                              
                                                            
                              
Explanation:
                               
                           
                           Explanation:
The atmosphere is a mixture of several gases. Nitrogen is the most abundant gas in the atmoshere and oxygen is next to it. It is 78% in the atmosphere and 21% is oxygen. Remaining 1% is all other gases like argon, hydrogen, neon, etc...
 
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