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Question

Blood does not clot inside the blood vessels due to the presence of

A
Heparin
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B
Fibrinogen
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C
Vitamin K
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D
Thrombin
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Solution

The correct option is B Heparin
Liver produces an anticoagulant, hetero-polysaccharide called heparin which prevent clotting inside the blood vessels. Heparin is a highly sulfated glycosaminoglycan and is also used to form an inner anticoagulant surface on experimental and medical devices.
Fibrinogen is a glycoprotein that helps in the formation of blood clots.
Thrombin is a blood coagulation factor.
Thus, the correct answer is option A.

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