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: Surgery
Most common cancer that metastasizes to leptomeninges : 
Select and explain. 
A. Lung cancer, B. Breast cancer, C. Prostate cancer, D. Ovarian cancer
B: Breast cancer
Answer: B: Breast cancer 
Explanation: Most common cancer that metastasizes to brain : Lung cancer.
Most common cancer that metastasizes to leptomeninges : Breast cancer.