Carbocation is a group of atoms with positively charged carbon atom having six electrons in the valence shell after sharing. Carbocations are formed in the heterolysis of a bond and are planar species. Stability of
\( P \) carbocation is determined by inductive effect, hyperconjugation and resonance effect. Greater the number W of contributing structures, more is the stability of a Carbocation. Electron releasing groups (+I effect) increases the stability of a carbocation whereas the electron withdrawing groups (-I effect) have an opposite effect.
The most stable and the least stable carbocation among and \( \mathrm{CH}_{3}-\mathrm{C}^{+} \mathrm{H}-\mathrm{CH}_{3} \) (IV) are respectively :
(A) II, I
(B) III, IV
(C) I, II
(D) I, IV
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