In humans and other primates as well as in guinea pigs, this vitamin cannot be synthesized because of the absence of the enzyme L-gulonolactone oxidase: the vitamin is_____________?

In humans and other primates as well as in guinea pigs, this vitamin c

1.	In humans and other primates as well as in guinea pigs, this vitamin cannot be synthesized because of the absence of the enzyme L-gulonolactone oxidase: the vitamin is_____________?
A.	Pantothenic acid
B.	Nicotinic acid
C.	Ascorbic acid
D.	Folic acid
Answer» D. Folic acid