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: Physiology
[{'content': 'Under physiological conditions heat acclimatization is accomplished by all except \nSelect and explain. \nA. Decreased renal blood flow, B. Increased urine sodium, C. Increased aldosterone secretion, D. Excessive sweating', 'role': 'user'}, {'content': 'Answer: B \nExplanation: During heat acclimatization, body tries to conserve the fluids and Na+. So the Na+ content in urine is low.', 'role': 'assistant'}]