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': 'Elimination of waste product from a normal person requires minimal amount of urine of: \nSelect and explain. \nA. 100 ml, B. 500 m, C. 100 ml, D. 2000 ml', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. 500m1 The minimum volume necessary to remove all waste products, with a normal diet, is 500m1/dayQ and is called obligatory volume.* O liguriaQ - urinary output less than 500m1Q in 24 hrs.', 'role': 'assistant'}]