For an irreversible process occurring at constant $T$ and $P$,where only pressure-volume work is involved,which condition for entropy change $(\Delta S)$ and Gibbs free energy change $(\Delta G)$ is satisfied?

• A
  $(\Delta S) = 0, (\Delta G) = 0$
• B
  $(\Delta S) = 0, (\Delta G) > 0$
• C
  $(\Delta S) < 0, (\Delta G) < 0$
• D
  $(\Delta S) > 0, (\Delta G) < 0$