This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Renal physiology, Subject name: Physiology
[{'content': 'Hormones secreted by kidney \nSelect and explain. \nA. Erythropoietin, B. Aldosterone, C. Vasopressin, D. Angiotensin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The kidneys produce three hormones: 1,25-dihydroxycholecalciferol, renin, and erythropoietin.Ref: Ganong&;s Review of Medical Physiology, 23rd edition, page no: 670', 'role': 'assistant'}]