In the absence of which one of the following vitamins blood clotting time is increased ?

The correct answer is (a). Vitamin K is essential for the production of prothrombin, a protein that is necessary for blood clotting. In the absence of vitamin K, prothrombin levels decrease, which can lead to increased blood clotting time.

Vitamin D is important for bone health, but it does not play a role in blood clotting. Vitamin E is an antioxidant that protects cells from damage, but it does not play a role in blood clotting. Vitamin C is also an antioxidant, and it is involved in the production of collagen, a protein that is found in blood vessels. However, vitamin C does not play a direct role in blood clotting.

Here are some additional details about vitamin K:

• Vitamin K is a fat-soluble vitamin that is found in green leafy vegetables, broccoli, Brussels sprouts, and liver.
• Vitamin K is also available as a supplement.
• Vitamin K is necessary for the production of prothrombin, a protein that is necessary for blood clotting.
• In the absence of vitamin K, prothrombin levels decrease, which can lead to increased blood clotting time.
• Vitamin K deficiency can be caused by a number of factors, including poor diet, malabsorption, and certain medications.
• Vitamin K deficiency can lead to bleeding problems, such as easy bruising and nosebleeds.
• Vitamin K deficiency can also lead to problems with blood clotting, such as prolonged bleeding after surgery or injury.
• Vitamin K deficiency is usually treated with vitamin K supplements.
• Vitamin K is an important nutrient that is necessary for blood clotting.