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Blood fails to clot white flowing in the blood vessel because of the presence of
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- Heparin
- Prothrombin
- Haemoglobin
- Hirudin
Correct Option: A
Heparin also known as un-fractionated heparin, a highly sulfated glycosaminoglycan, is widely used as an injectable anticoagulant, and has the highest negative charge density of any known biological molecule.
