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': 'Volume of ECF in body is \nSelect and explain. \nA. 0.1 × body weight, B. 0.2 × body weight, C. 0.3 × body weight, D. 0.4 × body weight', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Total body weight = 0.6\xa0× body weight\nICF = 0.4\xa0× body weight\nECF = 0.2\xa0× body weight\nPlasma = 0.05\xa0× body weight\nInterstitial fluid = 0.15\xa0× body weight', 'role': 'assistant'}]