<prompt> Action of lipoprotein lipase:Activation of IP3-DAG.Hydrolysis of triglycerides in chylomicrons.Coupling of DAG MAG to form triglycerides.Hydrolysis of dietary and endogenous triglycerides  <response>: 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. 