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The correct answer is option 3: Blood clotting.
Vitamin K plays a key role in the process of blood clotting, also known as coagulation. When you have a wound or injury, blood clotting is necessary to stop bleeding and help in the healing process. Vitamin K aids in the production of certain proteins that are required for blood clotting.
Option 1: Fertility - Vitamin K is not directly related to fertility. It is more involved in blood clotting mechanisms in the body rather than reproductive functions.
Option 2: Blood synthesis - Vitamin K is not directly involved in the production of blood cells, which is a process called hematopoiesis.
Option 4: Skin integrity - While Vitamin K may play a role in maintaining skin health, its primary function lies in blood clotting rather than directly related to skin integrity.Alert - correct answer should be 2