On which substrate does the enzyme lipase work?

In the enzyme which catalyses the breakdown of:
$H_2O_2 \rightarrow H_2O + O_2$
the prosthetic group is:

$A$: Allosteric enzymes do not show a typical Michaelis-Menten constant or behavior.
$R$: All enzymes work at the same $pH$.

Metabolic flux is regulated by

The figure given below shows the conversion of a substrate into product by an enzyme. In which one of the four options $(A-D)$ are the components of the reaction labeled as $A, B, C,$ and $D$ identified correctly?

Name the class of enzyme that usually catalyzes the following reaction:
$S-G + S^* \rightarrow S + S^*-G$
Where,
$G \rightarrow$ a group other than hydrogen
$S \rightarrow$ a substrate
$S^* \rightarrow$ another substrate