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': "Osmotic pressure can be calculated by using \nSelect and explain. \nA. Bernoulli's law, B. Van't hoff law, C. Ohm's law, D. Poiseulle's law", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Osmotic pressure is calculated by van hoofs rule. (REF: GANONG&;S REVIEW OF MEDICAL PHYSIOLOGY, PAGE NO - 7)', 'role': 'assistant'}]