This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
[{'content': 'Intracellular water is how much percentage of body weight \nSelect and explain. \nA. 40%, B. 60%, C. 25%, D. 80%', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ICF-40% of TBW.(Ref.Textbook of physiology 4th edition page no.24 table 1.3.1)', 'role': 'assistant'}]