This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'Polycythemia is associated with \nSelect and explain. \nA. Stomach cancer, B. Liver cancer, C. Prostate cancer, D. Renal cell cancer', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Polycythemia and increased erythropoietin in a patient with chronic kidney disease. ... DIAGNOSIS: Chronic renal insufficiencycaused by obstructive hydronephrosis andaccompanied by increased erythropoietin levels of renal origin and polycythemia.', 'role': 'assistant'}]