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': 'The graph given below shows \nSelect and explain. \nA. Simple diffusion, B. Facilitated diffusion, C. Primary active transport, D. Secondary active transport', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]