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: Radiology
[{'content': 'For a full mouth examination, how many IOPAs are required for a child aged 8-9 years? \nSelect and explain. \nA. 10, B. 12, C. 8, D. 14', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Mixed Dentition (7 to 12 Years):\xa0A complete examination of the mixed dentition, if indicated, consists of two incisor periapical views, four canine periapical views, four posterior periapical views and two to four posterior bitewing views.\nNote: For 8-9 years of age, 12 film survey is recommended (Principles and practice of Pedodontics by Arathi Rao). So, 12 will be better answer.', 'role': 'assistant'}]