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: Skin
[{'content': 'All are false except \nSelect and explain. \nA. Sweat glands are most numerous on back & least on sole, B. Palm & sole sweat glands are last to appear, C. Sweat duct produce isotonic sweat, D. Hypothalmic preoptic nucleus has key role in sweating', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Hypothalmic preoptic nucleus has key role in', 'role': 'assistant'}]