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 composition of which of the following is highest in the cell membrane? \nSelect and explain. \nA. Proteins, B. Phospholipids, C. Cholesterol, D. Carbohydrates', 'role': 'user'}, {'content': 'Answer: A \nExplanation: As per the 12th Edition of Guyton, the following are the approximate composition of a cell membrane/ plasma membrane.\n\nProteins- 55%\nPhospholipids- 25%\nCholesterol-13%\nOther lipids- 4%\nCarbohydrates- 3%', 'role': 'assistant'}]