The gas X is only about 20 parts out of 100 parts of air in the atmosphere. It is needed for decomposition of organic matter. The gas X is
A Carbon dioxide
B Water vapour
C Oxygen
D Nitrogen.
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The gas X is only about 20 parts out of 100 parts of air in the atmosphere. It is needed for decomposition of organic matter. The gas X is
A Carbon dioxide
B Water vapour
C Oxygen
D Nitrogen.