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
Action of lipoprotein lipase: 
Select and explain. 
A. Activation of IP3-DAG., B. Hydrolysis of triglycerides in chylomicrons., C. Coupling of DAG & MAG to form triglycerides., D. Hydrolysis of dietary and endogenous triglycerides
D: Hydrolysis of dietary and endogenous triglycerides
Answer: D: Hydrolysis of dietary and endogenous triglycerides 
Explanation: Lipoprotein lipase Hydrolysis of triglycerides in chylomicrons (dietary TGs) & VLDL (can contain both endogenous or exogenous triglycerides). So The best answer is option 4 instead of option 2 Apo C-I and C-II - activate Lipoprotein Lipase. Apo C-III - inhibits Lipoprotein Lipase.