Which of the following is an example for group specificity?

• A. Trypsin hydrolyzing peptide linkages involving arginine or lysine
• B. Lipase hydrolyzing ester bond of lipids
• C. Hexokinase phosphorylating one or more kind of hexoses
• D. L-lactate dehydrogenase will act only on L-lactic acid, and not D-lactic acid