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
Which of the following anticancer drugs can cross blood brain barrier 
Select and explain. 
A. Cisplatin, B. Nitrosourea, C. Vincristine, D. Vinbalstine
B: Nitrosourea
Answer: B: Nitrosourea 
Explanation: Nitrosourea like carmustine ,lomustine, and semutine, can cross blood brain barrier and thus are used for treatment of gliomas Refer KDT 6/e p822