Which of the following is the correct order of stability of free radicals ?

Stability of different free radicals in decreasing order is as follows,

$\left({\mathrm{C}}_6{\mathrm{H}}_5\right)-\stackrel{0}{\mathrm{C}>}{\left({\mathrm{C}}_6{\mathrm{H}}_5\right)}_2-\stackrel{0}{\mathrm{C}-}\mathrm{H}>{\mathrm{C}}_6{\mathrm{H}}_5-\stackrel{0}{\mathrm{C}}{\mathrm{H}}_2>{\mathrm{H}}_2\mathrm{C}$

$=\mathrm{CH}-\underset{\underset{{\mathrm{CH}}_3}{|}}{\stackrel{\bullet }{\mathrm{C}}}-{\mathrm{CH}}_3 >$

${\mathrm{CH}}_2=\mathrm{CH}-\mathrm{CH}-{\mathrm{CH}}_3>{\mathrm{CH}}_2=\mathrm{CH}-{\mathrm{CH}}_2>3^{\mathrm{o}}$

alkyl free radical > 2° alkyl free radical > p-alkyl free radical > CH • Stability alkyl free radical can be explained by hyperconjugation number of resonating structures due to hyper conjugation.