Select the incorrect statement for ${\mathrm{C}}_2{\mathrm{H}}_2$

In sp hybridization of C-atoms, the pure p-orbitals left are $2{\mathrm{p}}_{\mathrm{y}}$ and $2{\mathrm{p}}_{\mathrm{z}}$

Pure p-orbitals form two $\mathrm{\pi }-\mathrm{bonds} \mathrm{between} \mathrm{two} \mathrm{C}-\mathrm{atoms}$

The triple bond between two C-atoms is made up of one sigma and two $\mathrm{\pi }$-bonds

$\mathrm{C}—\mathrm{C}—\mathrm{H}$bond angle is ${180}^{\mathrm{o}}$