Which of the following option(s) will show decrease in Gibbs free energy?

Vapourisation of ${\mathrm{H}}_2\mathrm{O}$ at $100°\mathrm{c}$ and 1 bar if its normal boiling point is $100°\mathrm{c}$.

 Combustion of propane at 1 bar and 500 K.

 Fusion of ${\mathrm{H}}_2\mathrm{O}$ at 1 atm  and $0^{\circ }\mathrm{C}$ if its normal melting point is $0^{\circ }\mathrm{C}$.

Vapourisation of any liquid at 1 atm  and above its normal boiling point.