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: Biochemistry
Which of the following is an activator of LCAT 
Select and explain. 
A. Apo B 100, B. Apo B 48, C. Apo E, D. Apo AI
D: Apo AI
Answer: D: Apo AI 
Explanation: Apo-Al 

Apo A-I is an activator for lecithin : cholesterol acyl transferase (LCAT).