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': 'Occlusal radiograph can locate: \nSelect and explain. \nA. Supernumerary teeth, B. Impacted teeth, C. Stones in salivary duct, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Typically, the occlusal radiograph is especially useful in the following cases:\n\nTo\xa0locate\xa0precisely\xa0roots\xa0and\xa0supernumerary,\xa0unerupted,\xa0and impacted teeth (this technique is especially useful for impacted\xa0canines and third molars).\nTo localize foreign bodies in the jaws and stones in the ducts of sublingual and submandibular glands.\nTo\xa0demonstrate\xa0and\xa0evaluate\xa0the\xa0integrity\xa0of\xa0the\xa0anterior, medial, and lateral outlines of the maxillary sinus.\n\nRef: ORAL RADIOLOGY Principles\xa0and\xa0Interpretation,Stuart C. White,Michael J. Pharoah Edition 7 page no 126', 'role': 'assistant'}]