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': 'Most permeable to pure phospholipid bilayer \nSelect and explain. \nA. Oxygen, B. Na, C. Cl, D. Water', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Phospholipid bilayer act as amphipathic molecule. Oxygen is most permeable. (REF. GANONG&;S REVIEW OF MEDICAL PHYSIOLOGY 24 EDITION, PAGE NO - 36)', 'role': 'assistant'}]