In which of the following equilibria, K_ p and K_ c are NOT equal?

In which of the following equilibria,

\mathrm{K}_{\mathrm{p}}

and

\mathrm{K}_{\mathrm{c}}

are NOT equal?

Options

A $\mathrm{H}_{2(\mathrm{~g})}+$ \mathrm{I} $_{2(\mathrm{~g})} \rightleftharpoons 2 \mathrm{HI}_{(\mathrm{g})}$
B $\mathrm{CO}_{(\mathrm{g})}+\mathrm{H}_2 \mathrm{O}_{(\mathrm{g})} \rightleftharpoons \mathrm{CO}_{2(\mathrm{~g})}+\mathrm{H}_{2(\mathrm{~g})}$
C $\quad 2 \mathrm{BrCl}_{(\mathrm{g})} \rightleftharpoons \mathrm{Br}_{2(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})}$
D $\mathrm{PCl}_{5(\mathrm{~g})} \rightleftharpoons \mathrm{PCl}_{3(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})}$

D. $\mathrm{PCl}_{5(\mathrm{~g})} \rightleftharpoons \mathrm{PCl}_{3(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})}$

\begin{aligned} & \mathrm{K}_{\mathrm{p}}=\mathrm{K}_{\mathrm{c}}(\mathrm{RT})^{\Delta \mathrm{n}_{\mathrm{g}}} \\ & \text{ for } \mathrm{K}_{\mathrm{p}} \neq \mathrm{K}_{\mathrm{c}} \\ & \qquad \Delta \mathrm{n}_{\mathrm{g}} \neq 0 \\ & \Delta \mathrm{n}_{\mathrm{g}}=\mathrm{n}_{\mathrm{p}}-\mathrm{n}_{\mathrm{r}} \end{aligned}

(1)

\Delta \mathrm{n}_{\mathrm{g}}=2-2=0

(2)

\Delta \mathrm{ng}_{\mathrm{g}}=2-2=0

(3)

\Delta \mathrm{ng}_{\mathrm{g}}=2-2=0

(4)

\Delta \mathrm{ng}_{\mathrm{g}}=2-1=1