To prevent clotting of stored blood in blood banks, which of the following is used?

Calcium sulphate

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Prothrombin

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Potassium or sodium citrate

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None of these

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Solution

The correct option is C Potassium or sodium citrate
Calcium is required for clotting of blood. Sodium or potassium citrate binds to calcium and makes it unavailable for clotting blood. Hence they are used in blood collection to prevent clotting of stored blood in blood banks.

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