Answer: Option D. "Liver"
Explanation:
Riboflavin can be defined as the vitamin B which is involved in many processes of the body. It is vital for the proper growth of the body.
It is found in live in a very high amount. There are many other sources of riboflavin such as green vegetables, bread cereals et cetera.
It is a water soluble vitamin found in the which is absorbed by small intestine and get stored in the liver of the human beings in a very minute quantity.
