This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lipoproteins, Subject name: Biochemistry
Which of the following is an activator of LCAT ? 
Select and explain. 
A. Apo B100, B. Apo B 48, C. Apo E, D. Apo A1
D: Apo A1
Answer: D: Apo A1 
Explanation: LCAT: Lecithin Cholestrol Acyl Transferase This enzyme is involved in HDL for the conversion of Cholestrol to Cholestrol ester by adding one fatty acid in it. This fatty acid is taken from lecithin and is given to cholesterol. The nick name of this Fatty acid is acyl. So, the name of this enzyme is Acyl Transferase. Apo A-I - activate LCAT Apo A-II - inhibits LCAT