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': 'All are X-ray findings of retinoblastoma except – \nSelect and explain. \nA. Widening of optic canal, B. Intra cerebral calcification, C. Intraocular calcification, D. Secondaries in cranial bones', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Retinoblastoma is the most common cause of orbital calcification (nodular or punctate calcification & is favourable prognostic sign).\nEnlargement of orbit & orbital canal occurs d/t involvement of optic nerve & intracranial extension.\nMetastasizes to meninges, cranial bones, bone marrow, lung, liver, lymph node.', 'role': 'assistant'}]