This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
The anticoagulant of choice for anticoagulation testing is 
Select and explain. 
A. Heparin, B. EDTA, C. Sodium oxalate, D. 3.2% trisodium citrate
D: 3.2% trisodium citrate
Answer: D: 3.2% trisodium citrate 
Explanation: MOA - Removes calcium Preferred uses - platelets studies, coagulation studies, ESR Advantages - preserves labile coagulation factors