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': 'Minimum quantity of blood required to be preserved for chemical analysis is : \nSelect and explain. \nA. 2 ml, B. 10 ml, C. 50 ml, D. 100 ml', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. 10 ml', 'role': 'assistant'}]