This vitamin is also known as "Castle's extrinsic factor''

Options

A. Vitamin `B_6`
B. Vitamin K
C. Vitamin `B_2`
D. Vitamin `B_12`

Answer

D

Explanation

Intrinsic factor is secreted by parietal cells of the gastric glands in the stomach, where it binds with the vitamin. Thus bound intrinsic factor protects vitamin B12 from digestion as it passes through the gastrointestinal tract and facilitates the vitamin’s absorption in the ileum of the small intestine.