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': 'The second most common skull radiograph used in dentistry is: \nSelect and explain. \nA. Lateral Cephalometric Projection, B. PA Cephalometric Projection, C. Both, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Lateral Cephalometric Projection is the most common extraoral skull radiograph.', 'role': 'assistant'}]