Cofactor required for lipoprotein lipase activity is:: (A) Apo A-II, (B) Apo C-II, (C) Apo C-III, (D) Apo B-II
Answer is B. The enzyme lipoprotein lipase is present in the capillary walls of adipose tissue, cardiac and skeletal muscle, besides other tissues. 
lt hydrolyses a portion of triacylglycerols present in chylomicrons and VLDL to liberate free fatty acids and glycerol.
Lipoprotein lipase is activated by apo C ll.

Key Concept:
Lipoprotein lipase is activated by apo C ll.
Ref : Textbook of Biochemistry, Satyanarayana