This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cytotoxic Anticancer Drugs, Subject name: Pharmacology
[{'content': 'Sterility is caused by: \nSelect and explain. \nA. Vinca alkaloids, B. Alkylating agents, C. Antimetabolites, D. Actinomycin D', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Sterility and secondary leukemias are distinctive adverse effects of alkylating agents. Other adverse effects of alkylating agents: BM depression Alopecia Mucositis - Diarrhoea Hyperuricemia', 'role': 'assistant'}]