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': 'Number of films required for full mouth radiographs of a child aged 10 years: \nSelect and explain. \nA. 4 films, B. 12 films, C. 14 films, D. 20 films', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Full mouth survey radiographs:', 'role': 'assistant'}]