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': 'Ifosfamide is an - \nSelect and explain. \nA. Alkylating agent, B. Antimetabolite, C. Folate antagonist, D. Plant alkaloid', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Alkylating agent", 'role': 'assistant'}]