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: Medicine
Treatment of choice of intracranial ALL is - 
Select and explain. 
A. Intrathecal methotrexate, B. Vincristine and predinisolone, C. Intrathecal vincristine, D. Prednisolone
A: Intrathecal methotrexate
Answer: A: Intrathecal methotrexate 
Explanation: None