The right answer is A.
Storing and transmitting the genetic information is the role of the DNA.
Proteins are biological macromolecules found in all living cells. They are formed of one or more polypeptide chains. Each of these chains consists of the sequence of amino acid residues linked together by peptide bonds. They can have multiple roles depending on their structure and composition
1- Maintenance of oncotic pressure
2- Buffer role
3- Transport function
4- Enzymes and Coenzymes
5- Role in coagulation and fibrinolysis
6- Role in immunity and allergy
7- Role in inflammation
8- Hormonal role