Question

Which gas makes up most of Earth's atmosphere?

A. argon
B. oxygen
C. nitrogen
D. carbon dioxide

Answer 1

The answer is C. nitrogen

Nitrogen makes up most of Earth's atmosphere.

Oxygen: 21%

Nitrogen: 78%

Other including Argon (0.9%) and Carbon Dioxide (0.03%)

Answer 2

answer is option C. nitrogen as:-

OXYGEN- 21%
NITROGEN- 78%
CARBON DIOXIDE, ARGON, NEON and SEVERAL OTHER GASES- 1%