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(C) The stability of carbocations is determined by resonance,hyperconjugation,and inductive effects. $(i)$ and $(iii)$ are stabilized by resonance due

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$(i) > (iii) > (ii) > (iv)$

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(C) The stability of carbocations is determined by resonance,hyperconjugation,and inductive effects. $(i)$ and $(iii)$ are stabilized by resonance due to the lone pair on the oxygen atom adjacent to the carbocation center. Between $(i)$ and $(iii)$,$(i)$ has more hyperconjugative hydrogens $(6 \ \alpha-H)$ compared to $(iii)$ $(3 \ \alpha-H)$,making $(i)$ more stable than $(iii)$. $(ii)$ and $(iv)$ are alkyl carbocations stabilized by hyperconjugation. $(ii)$ is a secondary carbocation with $5 \ \alpha-H$,while $(iv)$ is a primary carbocation with $2 \ \alpha-H$. Thus,$(ii)$ is more stable than $(iv)$. Combining these,the overall stability order is $(i) > (iii) > (ii) > (iv)$.

What is the correct order of stability for the following carbocations?

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