This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of lipid, Subject name: Biochemistry
Phospholipid that plays an impoant role in apoptosis is? 
Select and explain. 
A. Phosphatidylcholine, B. Phosphatidylserine, C. Phosphatidylethanolamine, D. Phosphatidylglycerol
B: Phosphatidylserine
Answer: B: Phosphatidylserine 
Explanation: PHOSPHOLIPIDS ROLE Phosphatidylserine Apoptosis Dipalmitoyl phosphatidylcholine Lung surfactant Cardiolipin Mitochondrial function Biological false positive VDRL Phosphatidyl inositol Reservoir of prostaglandin synthesis signal transmission across membranes Reference: Harpers illustrated biochemistry 30th edition page 215