In any spontaneous process,

Answer: Option C

For any spontaneous process there should be finite changes so, we can consider it as an irreversible process and we know for irreversible process from second law of thermodynamics $$TdS-dU-PdV>0$$
Under constant temperature and volume process $$-dF>0\Rightarrow dF<0$$
Similarly for an constant temperature and pressure process
$$\begin{array}{rl}& d\left(TS-U-PV\right)>0\\ & \Rightarrow dG=0\end{array}$$