Which of the following additives prevent coagulation of blood by removing calciumand forming insoluble calcium salts?
A. EDTA, potassium oxalate, sodium citrate
B. EDTA, lithium heparin, sodium citrate
C. Sodium fluoride, lithium heparin, EDTA
D. Ammonium heparin, sodium citrate, potassium oxalate
Answer: A
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