That would be biochemistry.
The element that is most common in Vitamin D is CARBON.
Answer: False, it is transported as bicarbonate
Explanation: Carbonic anhydrase is an enzyme belonging to the family of metalloenzymes that catalyzes the conversion of carbon dioxide and water to ions and carbonic acid. This enzyme is found in red blood cells where carbon dioxide enters by diffusion. Once it diffuses through it is then converted by carbonic anhydrase to bicarbonate and hydrogen ions.
That is how its transported in bloodstream, passes through the heart via the venous system, to the lungs. Therefore the answer is False.
