This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: vitamins, Subject name: Biochemistry
The only fat-soluble vitamin that has coenzyme function 
Select and explain. 
A. A, B. D, C. E, D. K
D: K
Answer: D: K 
Explanation: Vitamin k acts as a Coenzyme in the formation of g-carboxyglutamate in enzymes of blood clotting and bone matrix.All water-soluble vitamins act as coenzymes.Harper 30th edition pg: 550