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': 'Suprasellar calcification with growth retardation is seen in – \nSelect and explain. \nA. Pineal body tumor, B. Pituitary tumor, C. Thalamic tumor, D. Craniopharyngioma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]