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': 'In nux vomica poisoning the following are also required to be preserved : \nSelect and explain. \nA. Long bones, B. Brain, C. Muscles, D. Skin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Brain', 'role': 'assistant'}]