To prevent coagulation, blood stored in blood bank contains a small amount of

Calcium sulphate

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Prothrombin

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Potassium or sodium citrate

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None of the above

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Solution

The correct option is D Potassium or sodium citrate
While donating blood, the blood is usually stored in a flexible plastic bag, that also contains sodium citrate, phosphate, dextrose and sometimes adenine. This combination keeps the blood from clotting and preserves it during storage. This blood gets stored in blood banks.
Thus, the correct answer is option (C).

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