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
[{'content': 'A 40 year old patient with a single kidney presents with a solitary exophytic mass of 4 cm localized at its lower pole. Which amongst the following is the best recommended management option? \nSelect and explain. \nA. Paial Nephrectomy, B. Radical Nephrectomy, C. Radical Nephrectomy with dialysis, D. Radical Nephrectomy with immediate Renal Transplantation', 'role': 'user'}, {'content': "Answer: A \nExplanation: Paial Nephrectomy is the surgical treatment of choice for a small localized tumor in patients with a solitary kidney. Ref: Minimally Invasive Cancer Management By Frederick L. Greene, B. Todd Heniford, Page 265; Glenn's Urologic Surgery By Sam D. Graham, Thomas E. Keane, Page 6", 'role': 'assistant'}]