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: Pharmacology
[{'content': 'Alkylating agents are all except ? \nSelect and explain. \nA. Buslfan, B. Carmustine, C. Dacarbazine, D. Etoposide', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is `d' i.e., Etoposide", 'role': 'assistant'}]