Which kind of molecule is used by organisms to store and transmit genetic material?

A. nucleic acid

B. carbohydrate

C. protein

D. lipid

Carbohydrates are composed of sugar and other things for energy storage

Lipids have fats, phospholipids and steroids and they also store energy as well as protecting organs.

Proteins composed of amino acid and have wide selections of functions like molecular transport and to improve the muscles too.

Nucleic acid include DNA and RNA which includes acids to instruct the protein synthesis so it can allow organisms to transfer genetic information.

Genetic material? I would say Nucleic acid.