question_answer

Vitamins synthesized by intestinal bacteria and absorbed in significant quantities include:

A) folicacid                        

B) riboflavin

C) thiamine                       

D) vitamin \[{{B}_{12}}\]

Correct Answer: A

Solution :

Several vitaminsincluding vitamin K, several of the B-complex and folic acidcan be synthesized by intestinal bacteria. However, in humans, only folic acid so synthesized is absorbed by the host.