Q. Which of the following is a fat-soluble vitamin that plays a role in blood clotting, bone metabolism and regulating blood calcium levels?
Answer: Vitamin K
Notes: Vitamin K refers to a group of fat-soluble vitamins that play a role in blood clotting, bone metabolism, and regulating blood calcium levels. The body needs vitamin K to produce prothrombin, a protein and clotting factor that is important in blood clotting and bone metabolism.