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
Non- functional enzymes are all except: 
Select and explain. 
A. Alkaline phosphatase, B. Acid phosphatase, C. Lipoprotein lipase, D. Gamma glutamyl transpeptidase
C: Lipoprotein lipase
Answer: C: Lipoprotein lipase 
Explanation: Lipopein lipase is a functional enzyme (i.e. has physiological role) that hydrolyze lipids in lipoproteins (chylomicrons & VLDL) into free fatty acids and glycerol molecule.