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Question

Platelets are a source of ______________.

A
Fibrinogen
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B
Calcium
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C
Thromboplastin
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D
Haemoglobin
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Solution

The correct option is C Thromboplastin
Thromboplastin is a plasma protein aiding blood coagulation through catalyzing the conversion of prothrombin to thrombin. It is a complex enzyme that is found in brain, lung, and other tissues and especially in blood platelets and that functions in the conversion of prothrombin to thrombin in the clotting of blood—called also thrombokinase.

So, the correct answer is 'Thromboplastin'.

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