Chemistry - GOC Question with Solution | TestHub

Consider the following carbocations, stability of carbocations increasing order
$\left(\text{I}\right){\text{C}}_{\text{6}}{\text{H}}_{\text{5}}\stackrel{\text{+}}{\text{C}}{\text{H}}_{\text{2}}\left(\text{II}\right){\text{C}}_{\text{6}}{\text{H}}_{\text{5}}{\text{CH}}_{\text{2}}\stackrel{\text{+}}{\text{C}}{\text{H}}_{\text{2}}$
$\left(\text{III}\right){\text{C}}_{\text{6}}{\text{H}}_{\text{5}}\stackrel{\text{+}}{\text{C}}{\text{HCH}}_{\text{3}}\left(\text{IV}\right){\text{C}}_{\text{6}}{\text{H}}_{\text{5}}\stackrel{\text{+}}{\text{C}}{\left({\text{CH}}_{\text{3}}\right)}_2$