The two most abundant gases in our atmosphere, combine to equal 99% of the atmospheric composition are nitrogen and oxygen
The correct option is C.
What is nitrogen?
Nitrogen is a gas that is most abundant in the atmosphere. This gas makes up 78% of the total gases present on earth.
What is oxygen?
Oxygen is the second most abundant gas found on earth. It is the most useful gas on the earth because we can not breathe without this gas.
Oxygen makes up 21% of the total gas present on earth.
Thus, the correct option is c. oxygen and nitrogen.
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