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The order of stability of the following carbocations : CH 2 III CH 2 =CH–CH 2 ; CH 3 –CH 2 –CH 2 ; I II ⊕ ⊕ ⊕ is -

1. I > II > III
2. III > I > II
3. III > II > I
4. II > III > I

Correct answer: III > II > I

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