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?
Held on 30 Apr 2004 · Verified 9 Jul 2026.
test tube containing calcium bicarbonate
chilled test tube
test tube containing heparin
test tube containing sodium oxalate.
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