This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy: General Principles, Subject name: Pharmacology
[{'content': 'Which of the following anticancer drugs can cross blood brain barrier? \nSelect and explain. \nA. Cisplatin, B. Nitrosourea, C. Vincristine, D. Vinblastine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (B) Nitrosourea(Ref: KDT 8th/e p919)Nitrosoureas like carmustine, lomustine and semustine can cross blood brain barrier and thus are used for treatment of gliomas.', 'role': 'assistant'}]