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
Which of the following phospholipid has antigenic activity: 
Select and explain. 
A. Plasmalogen, B. Cardiolipin, C. Phosphatidyl choline, D. Sphingomyelin
B: Cardiolipin
Answer: B: Cardiolipin 
Explanation: Cardiolipin Phospholipid Found only in mitochondria. Antigenic (usually phospholipids are not antigenic). Anticardiolipin antibodies are found in APLA Syndrome