In human, the prothrombin required for blood clotting is produced inside the

Liver

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Blood

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Bone

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Spleen

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Solution

The correct option is A Liver
Prothrombin is a coagulation or clotting factor that is needed for the normal clotting of blood. A cascade of biochemical events leads to the formation of the final clot. In this cascade, prothrombin is a precursor to thrombin.
Prothrombin is produced in the liver and is modified in the presence of vitamin K.
Therefore, the correct answer is option A.

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