This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
Renal carcinoma with solitary lung secondary is best treated by 
Select and explain. 
A. Radiotherapy, B. Surgery, C. Chemotherapy, D. Immunotherapy
B: Surgery
Answer: B: Surgery 
Explanation: Surgery is the best option because 1) cytoreductive surgery will help in increase the action of immunotherapy 2) metstatectomy ( surgery to remove metstatectomy ) with curative intent has good prognosis in pulmonary Mets Ref : Campbell and Walsh urology 11th edition . chapter 63. pg no 1502