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': 'Privation of any member of joint is a .... hu: \nSelect and explain. \nA. Simple, B. Grevious, C. Serious, D. Dangerous', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Grevious', 'role': 'assistant'}]