Final answer:
Pantothenic acid, also known as vitamin B5, has several important functions in the body including assisting in glucose, fat, and protein metabolism. However, collagen synthesis is not a function of pantothenic acid.
Step-by-step explanation:
The correct answer is b. collagen synthesis.
Pantothenic acid, also known as vitamin B5, has several important functions in the body including assisting in glucose, fat, and protein metabolism. It is also involved in the synthesis of neurotransmitters and is required for the production of coenzyme-A, which is necessary for fatty acid and cholesterol synthesis.
However, collagen synthesis is not a function of pantothenic acid. Collagen is a protein that provides structural support to tissues and is synthesized through a different pathway.