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': 'Caries assessment in children; which one is not high risk\nfactor \nSelect and explain. \nA. White opalescent area on the tooth, B. General hypoplasia, C. Initial demineralization, D. Child with special problems/needs', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]