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You are required to draw blood from a patient and to keep it i | MemoNeet Official

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 you will not use for the purpose? (2004)
Anonymous Quiz
25%
Test tube containing calcium bicarbonate
24%
Chilled test tube
38%
Test tube containing heparin
13%
Test tube containing sodium oxalate