Which vitamin is synthesized in the intestine by bacteria? a. vitamin k b. vitamin c c. vitamin a d. vitamin e e. vitamin d?

The correct answer is option a, that is, Vitamin K.

Vitamin K is primarily produced by the bacteria in the large intestine. The dietary sources include the green photosynthetic parts of the plants. The vitamin plays an essential role in the development of many blood-clotting factors in the liver, and their deficit can result in bleeding disorders.

There are two sources of vitamin K; this includes phylloquinone or vitamin K1, which is mainly found in green leafy vegetables and menaquinone or vitamin K2 that is produced by some kinds of intestinal bacteria.