List of top Physical Chemistry Questions on Phase rule

For the following reaction,
\[ 2\,\mathrm{Pb_3O_4(s)} \rightleftharpoons 6\,\mathrm{PbO(s)} + \mathrm{O_2(g)} \] The correct option showing the number of phases (P), number of components (C) and degrees of freedom (F) is: