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: Pathology
[{'content': 'Most common cause of renal tumor in adult is? \nSelect and explain. \nA. Family history, B. Smoking, C. Obesity, D. Hypeension', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. SmokingImpoant risk factors for RCC are smoking (most significant), obesity, hypeension, asbestos exposure, estrogen therapy, CRF, tuberous sclerosis and familial conditions (Von Hippel-Lindau syndrome).', 'role': 'assistant'}]