Which of the following is a vitamin that a person's body synthesizes?

A.	Vitamin E

B.	Vitamin C

C.	Vitamin A



D.	Vitamin D - D. Vitamin D





Vitamin D is the only vitamin the human body synthesizes, and the process of synthesis takes place within the person's skin. At the time this vitamin is inactive, and what makes the process successful is the presence of sunlight.





Trypsinogen is one enzyme that the pancreas secretes, and is then converted to trypsin by another enzyme,	, within ...