This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: CNS Tumors, Subject name: Pathology
[{'content': 'Which type of adenoma has the highest propensity to undergo dystrophic calcification? \nSelect and explain. \nA. Somatotroph adenoma, B. Coicotroph adenoma, C. Lactotroph adenoma, D. Thyrotroph adenoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Lactotroph adenomas have a propensity to undergo dystrophic calcification, ranging from isolated psammoma bodies to extensive calcification of viually the entire tumor mass ("pituitary stone").', 'role': 'assistant'}]