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
Which of the following anticancer drugs can cross blood brain barrier ? 
Select and explain. 
A. Cisplatin, B. Nitrosourea, C. Vincristine, D. Vinblastine
B: Nitrosourea
Answer: B: Nitrosourea 
Explanation: None