Which Statement Is Not True Regarding Vitamins

Which statement is not true regarding vitamins?

A) Human cells are able to synthesize most vitamins.
B) The symptoms of the deficiency can be reversed by the administration of the missing vitamin.
C) If the vitamin is not present in adequate amounts,the body's metabolism will be disrupted,and disease will result.
D) Vitamins or their precursors must be supplied in the diet.