This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Trauma, Subject name: Surgery
Most common origin of cerebral metastases is 
Select and explain. 
A. Colon, B. Kidney, C. Malanoma, D. Lung
D: Lung
Answer: D: Lung 
Explanation: Metastatic Brain Tumors Metastatic brain tumors are the most common tumors of the brain They out number primary brain tumors by 10 to 1 Location: Cerebral hemispheres (80%) mainly the frontal lobes, cerebellum (15%) and brain stem (5%) Most common primary sites : CA Lung (50%) >breast cancer(15-20%) Metastasis to brain are multiple in >70% of cases Ref: Harrison's 19th edition Pgno :1604