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': 'Major surfactant is ? \nSelect and explain. \nA. Dipalmitoyl lecithine, B. Dipalmitoyl cephaline, C. Dipalmitoyl serine, D. Dipalmitoyl inositol', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Decrease the surface tension of the fluid lining the alveoliDipalmitoyl-phosphatidylcholine (dipalmitoyl-lecithin) is the main surface tension lowering phospholipid in surfactant.", 'role': 'assistant'}]