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: Forensic Medicine
[{'content': 'For DNA test, liquid blood is preserved in: Karnataka 07; DNB 09; UP 10; NEET 13, 14 \nSelect and explain. \nA. Sodium citrate, B. Potassium oxalate, C. EDTA, D. Sodium fluoride', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. EDTA', 'role': 'assistant'}]