Which of the following is an example of a compound? a. sodium dioxide
b. hydrogen
c. water
d. carbon

Carbon

Explanation:

Carbon compounds are compounds whose molecules contain a carbon atom. They are chemical substances where a carbon atom has bonded to an atom of another element. These compounds are generally organic in nature. ... There are various inorganic carbon compounds as well like for example CO2 (carbon dioxide).

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b.have there own function.