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: Medicine
[{'content': 'Drug not used in treatment of Pituitary Adenoma is \nSelect and explain. \nA. Octreotoid, B. Bromocriptine, C. Orlistat, D. Letrozol', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]