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 estimated by all except \nSelect and explain. \nA. Family member, B. Genetic factors, C. Cephalometric analysis, D. Salivary flow', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]