This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: CNS Tumors, Subject name: Surgery
All of the following are true about brain metastasis except: 
Select and explain. 
A. Frontal lobe is the most common site, B. Lesions are located at the gray-matter and white-matter junction, C. Most common primary site is breast cancer, D. Chemotherapy can be used in brain metastases due to small cell lung cancer and seminomas
C: Most common primary site is breast cancer
Answer: C: Most common primary site is breast cancer 
Explanation: M/c brain tumor is Metastasis M/C primary site for brain metastasis is Ca Lung > Ca breast Frontal lobe is the most common site Lesions are located at the gray-matter and white-matter junction Treated with both Surgery and Radiotherapy (whole brain Radiotherapy) Chemotherapy is not helpful Exceptions: - Can be used in brain metastases due to small cell lung cancer and seminomas