Lipid protein amino acid nucleic acid carbohydrate all of these organic molecules are - based molecules. a) carbon b) hydrogen c) oxygen d) water

The correct answer will be option-A.

Explanation:

Organic molecules are the molecules which are composed of the carbon atoms attached with other elements like oxygen and hydrogen.

It is the property of carbon atoms that leads to the formation of a large number of compounds like the ability to form bonds with other carbon also known as "Catenation" and the capability to attach four other atoms due to four free valent called "tetra valency".

Since the biomolecules are made up of long chains of monomers sue to carbon atom therefore, option A is the correct answer.

i think its both a and b

answer: b

coz red blood cells marrow and circulates the body for 120 days.