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': 'For diagnosis of lunacy a person can be kept under observation at a streach for : \nSelect and explain. \nA. 2 Days, B. 7 Days, C. 10 Days, D. 30 Days', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. 10 days', 'role': 'assistant'}]