This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Anticoagulant used for chelating calcium - 
Select and explain. 
A. E DTA, B. Oxalate, C. Sodium citrate, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Answer-D. All of the aboveMost of the anticoagulants used in the laboratory act by binding calcium as an insoluble salt or soluble but un-ionized salt.Thesecalciumchelatinganticoagulantsare :-EDTADouble oxalateSodium citrateSodiumJluoride