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': 'Blood samples for "DNA finger printing" are transpoed in: \nSelect and explain. \nA. Saline, B. EDTA, C. NaF, D. Thymol', 'role': 'user'}, {'content': 'Answer: B \nExplanation: EDTA', 'role': 'assistant'}]