Statement (A): ${\text{CaCO}}_3\left(\text{s}\right)\rightleftharpoons \text{CaO(s)}+{\text{CO}}_2\left(\text{g}\right)$, is a Heterogeneous equilibrium.

Statement (B):${\text{PCl}}_5\left(g\right)\rightleftharpoons {\text{PCl}}_3\left(g\right){\text{+ Cl}}_2\left(g\right)$  is a Homogeneous equilibrium

Statement (C): ${\text{CH}}_3{\text{COOCH}}_3\left(\text{aq}\right)+{\text{H}}_2\text{O}\left(l\right)\rightleftharpoons {\text{CH}}_3\text{COOH}\left(\text{aq}\right)+{\text{CH}}_3\text{OH}\left(\text{aq}\right)$is a Dynamic equilibrium

${\text{CaCO}}_{\text{3}}$ is a solid, CaO is solid, ${\text{CO}}_{\text{2}}$ is a gas here reactants and products are in different phases so the given reaction is example for heterogeneous equilibrium.

${\text{PCl}}_{\text{5}}{\text{,\hspace{0.17em}PCl}}_{\text{3}}{\text{,\hspace{0.17em}Cl}}_{\text{2}}$ are in gaseous state .Here reactants and products are in same phases so the given reaction is example for homogeneous equilibrium.

The ester hydrolysis reaction is a dynamic equilibrium because after certain time period there is no change in the concentrations of the reactants and the products. This means the rate of both forward and back ward reactions are same at equilibrium and the reaction to be continuously.