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': 'Four film survey (series) for children consists of maxillary and mandibular occlusals along with: \nSelect and explain. \nA. Two maxillary posterior periapicals, B. Two mandibular posterior periapicals, C. Two posterior bitewings, D. One panoramic and one lateral jaw views', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 4 film survey requires 2 anterior occlusal and 2 bitewing radiographs.\n8 film survey requires 4 posterior, 2 anterior occlusal and 2 bitewing radiographs.\n12 film survey requires 4 IOPAs for posterior teeth, 4 canine IOPAs, 2 incisor IOPAs and 2 bitewing radiographs.\n16 film survey requires 4 permanent molar radiographs additional to the 12 film survey.\n\nRef: Principles and practice of Pedodontics by Arathi Rao', 'role': 'assistant'}]