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': 'A 16 film radiographic survey consists of the 12 film survey and the addition \nSelect and explain. \nA. 4 canine periapicals, B. 2 posterior bitewings and 2 occlusal, C. 4 permanent molar periapicals, D. 2 posterior bitewing, 1 OPG and 1 Lateral cephalogram', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 4 film survey requires 2 anterior occlusal and 2 bitewing radiographs.\u200b\n8 film survey requires 4 posterior, 2 anterior occlusal and 2 bitewing radiographs.\u200b\n12 film survey requires 4 IOPAs for posterior teeth, 4 canine IOPAs, 2 incisor IOPAs and 2 bitewing radiographs.\u200b\n16 film survey requires 4 permanent molar radiographs additional to the 12 film survey.\u200b\n\nRef: Principles and practice of Pedodontics by Arathi Rao', 'role': 'assistant'}]