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': "Which law states that the amount of a substance crossing a given area is directly proportional to the area available for diffusion, concentration gradient and diffusion coefficient? \nSelect and explain. \nA. Universal gas law, B. Dalton's law, C. Fick's law, D. All of the above", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Fick Law of Diffusion:\nDiffusion is well described by Fick law of diffusion. According to this law, amount of a substance crossing a given area is directly proportional to the area available for diffusion, concentration gradient and a constant known as diffusion coefficient.\nThus,\xa0\nAmount diffused = Area x Concentration gradient x Diffusion coefficient\nFormula of Fick law:', 'role': 'assistant'}]