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': 'Contributory negligence is by: \nSelect and explain. \nA. Doctor, B. Patient, C. Both, D. Attendant', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Both', 'role': 'assistant'}]