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': 'Panoramic view of the mandible of a patient with history of trauma shows 2 fracture lines at the angle of the mandible. It is most probably due to \nSelect and explain. \nA. Oblique fracture, B. Artifact, C. Double fracture, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: An oblique fracture that involves both cortical plates may cause some diagnostic difficulties if the fracture lines in the buccal and lingual plates are not superimposed.\xa0 In\xa0 this\xa0 case,\xa0 two\xa0 lines\xa0 are\xa0 seen\xa0 that converge at the periphery, suggesting two distinct fractures when in reality only one exists.', 'role': 'assistant'}]