Increasing rate of S N 1 reaction in the following compounds is: (I) (II) (III) (IV)

Increasing rate of ${\mathrm{S}}_{\mathrm{N}}1$ reaction in the following compounds is:
(I)
(II)
(III)
(IV)

1. $\left(\mathrm{I}\right)<\left(\mathrm{I}\mathrm{I}\right)<\mathrm{ }\left(\mathrm{I}\mathrm{I}\mathrm{I}\right)<\left(\mathrm{I}\mathrm{V}\right)$
2. $\left(\mathrm{I}\mathrm{I}\right)<\left(\mathrm{I}\right)<\mathrm{ }\left(\mathrm{I}\mathrm{I}\mathrm{I}\right)<\left(\mathrm{I}\mathrm{V}\right)$
3. $\left(\mathrm{I}\mathrm{I}\right)<\left(\mathrm{I}\right)<\mathrm{ }\left(\mathrm{I}\mathrm{V}\right)<\left(\mathrm{I}\mathrm{I}\mathrm{I}\right)$
4. $\left(\mathrm{I}\right)<\left(\mathrm{I}\mathrm{I}\right)<\mathrm{ }\left(\mathrm{I}\mathrm{V}\right)<\left(\mathrm{I}\mathrm{I}\mathrm{I}\right)$

Solution

Asked in: JEE Main 2019 (10 Apr Shift 1)

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