Question

22/29
which is used to make muscle and hair?
lipid
nucleic acid
protein
carbohydrate

Explanation:

Muscles are made of muscle fibers which are rich in proteins, and hair is primarily composed of a protein called keratin. Lipids are for energy storage and cell membranes, nucleic acids carry genetic info, and carbohydrates are for energy. So Protein is the correct choice.

Answer:

C. Protein