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': 'True about free water clearance is \nSelect and explain. \nA. Regulated by ADH, B. Regulated by aldosterone, C. Increased by furosemide, D. None of the above', 'role': 'user'}, {'content': "Answer: A \nExplanation: ADH or Vasopressin - hormone secreted by the posterior pituitary gland and also by nerve endings in the hypothalamus; affects blood pressure by stimulating capillary muscles and reduces urine flow by affecting reabsorption of water by kidney tubules Ref: Ganong's review of medical physiology; 24th edition; page no: 690", 'role': 'assistant'}]