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: Pharmacology
[{'content': 'Majority of drugs are transported across the membrane by \nSelect and explain. \nA. Passive diffusion, B. Active transport, C. Facilitated transport, D. Filtration', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]