What molecules are found in all or almost all organic compounds?
a. carbon and oxygen
c. carbon and nitrogen
b. hydrogen and oxygen
d. carbon and hydrogen

The correct answer is Option d.

Explanation:

Organic compounds are defined as the compounds which are found in living organisms.

These compounds mainly consists of carbon atoms which are covalently bonded to hydrogen, oxygen and nitrogen atoms.

For Example:  

Both the compounds are organic compounds because carbon is bonded to nitrogen, oxygen and hydrogen atoms.

Main elements present in any organic compound are carbon and hydrogen.

Hence, the correct answer is Option d.

201cm/s÷5: 18

explanation:

there is no explanation