You are required to draw blood from a patient and to keep it in a test tube for analysis of blood corpuscles and plasma. You are also provided with the following four types of test tubes. Which of these will you not use for the purpose?

A Test Tube Containing Calcium Bicarbonate

B Chilled Test Tube

C Test Tube Containing Heparin

D Test Tube Containing Sodium Oxalate

Answer & Explanation
Answer: Test Tube Containing Heparin

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