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': 'Osmotic pressure of 1 mol of idea solute relative to pure water is: \nSelect and explain. \nA. 6.5 atm., B. 22.4 atm., C. 4 atm., D. 2 atm.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. 22.4 1 mol of an ideal solute dissolved in 1 kg (1000 gm) of water (i.e. 1 molal or M solution) at 1 atm pressure at 25degC yields a solution whose osmotic pressure relative to pure water is 22.4 atmQ.', 'role': 'assistant'}]