This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidneys and Body Fluids, Subject name: Physiology
[{'content': 'Normal urea excretion rate is- \nSelect and explain. \nA. 1-2 gm per day, B. 10-20 gm/day, C. 20-40 gm per day, D. 50-100 gm/day', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., 10-20 gm/day "The physiologically normal individual excrete 12-20 gm of urea nitrogen in 24 hours"* However, excretion varies according to various factors, like nutritional status, dietary intake of proteins, physical activity level etc.', 'role': 'assistant'}]