This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, 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. Vinbalstine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Nitrosourea like carmustine ,lomustine, and semutine, can cross blood brain barrier and thus are used for treatment of gliomas Refer KDT 6/e p822', 'role': 'assistant'}]