Which amongst the following is the most stable carbocation?

Step-by-step solution

The most stable carbocation is t -alkyl carbocation because the order of stability of alkyl carbocation is t -alkyl s -alkyl p-alkyl CH ₃⁺ carbocation. This stability order is described with the help of hyperconjugation and inductive effect. On the basis of hyper conjugation, ( CH ₃ )₂ + C H shows six resonating structures due to presence of six C - H bonds, due to presence of nine C - H bonds + C H ₃ does not show the property of resonance while CH ₃- + C H ₂ shows three resonating structures due to presence of th