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: Social & Preventive Medicine
[{'content': 'Mistuda reaction is read at: \nSelect and explain. \nA. 3rd day, B. 10th day, C. 28th day, D. 45th day', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 28th day', 'role': 'assistant'}]