All of the following statements concerning folic acid are true:
A) Vitamin B found in beans, peas, broccoli, beets, spinach and sunflower seeds.
B) It has a pteridine nucleus and p-aminobenzoic acid, linked to one or more glutamic acid residues, once absorbed by the body.
C) It is converted by dihydrofolate reductase to THF (tetrahydrofolate), its biologically active form.
D) None
