The element that shows greater ability to form $\mathrm{p\pi }-\mathrm{p\pi }$ multiple bonds is:

$C$ forms most stable $\mathrm{p\pi }-\mathrm{p\pi }$ bonds because it has high bond dissociation energy, more electronegativity, high ionization energy and vacant $d-$ orbital is unavailable. While others have vacant orbital and low bond dissociation enthalpy and low ionisation enthalpy