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: Unknown
[{'content': 'All of the following are present in sweat except - \nSelect and explain. \nA. Calcium, B. Lactic acid, C. Urea, D. Uric acid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans D- Uric acidnote : calcium is excreted in sweat daily by 140 mg/day', 'role': 'assistant'}]