The most stable carbocation amongst the following is:

detailed solution

Correct option is C

→ Bridge head carbocation is highly unstableReason, the bridge head carbocation unable to acquires the planarity [120o] , and hence it is highly unstable.As the no. of +IE groups [alkyl groups] increases,sharing of positive charge by no of carbon atoms increases,i.e., charge distribution among the atoms increases,hence stability of carbocation increases.Hint:sharing increases,caring increases,stability increases.E.g:                                                        "H" is neither +IE nor –IE group                                      Here  "CH3" group acts as +IE group+ve cahrge located only on single carbon                   ∴+ve charge is shared among the 4-carbon atoms