This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemistry of Lipids, Subject name: Biochemistry
[{'content': 'Which of the following phospholipid is associated with apoptosis? \nSelect and explain. \nA. Phosphatidylcholine, B. Dipalmitoyl Phosphatidylcholine, C. Phosphatidylserine, D. Phosphatidylinositol 4,5-bisphosphate', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Lipid bilayer is asymmetric. Phosphatidylserine and phosphatidyl ethanolamine are located in the inner leaflet Lecithin and sphingomyelin are located in the outer leaflet. Flipping of phosphatidylserine to outer membrane is seen in apoptosis. This is the basis of annexin V assay', 'role': 'assistant'}]