Question

Which vitamin is essential for blood clotting?

• A. Vitamin A
• B. Vitamin D
• C. Vitamin E
• D. Vitamin K

Hint:

Vitamin K is known as the anti-haemorrhagic vitamin because it is essential for blood coagulation.

Answer 1

The Correct Option is D

Concept:
Blood clotting, also called coagulation, is a protective mechanism that prevents excessive blood loss after injury.

Step 1: Role of vitamin K.
Vitamin K is required for the synthesis of several clotting factors in the liver.

Step 2: Important clotting factors.
Vitamin K helps in the activation of clotting factors such as:
• Factor II
• Factor VII
• Factor IX
• Factor X

Step 3: Effect of deficiency.
If vitamin K is deficient, clotting factors are not properly formed. This may lead to delayed clotting and increased bleeding tendency.

Step 4: Checking other vitamins.
Vitamin A is mainly related to vision and epithelial health.
Vitamin D is important for calcium absorption and bone health.
Vitamin E acts mainly as an antioxidant.
Vitamin K is directly related to blood clotting.

Step 5: Final answer.
Therefore, vitamin K is essential for blood clotting. \[ \boxed{\text{Vitamin K}} \]