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: Dental
[{'content': 'Prognosis is \nSelect and explain. \nA. Most likely cause of the disease, B. Least likely cause of the disease, C. Estimation of the likely course of the disease, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]