Question
The most reactive towards $S_N1$ is$:$
✓
Answer
The rate of $S_N1$ reaction depends upon the stability of the carbocation formed.
The compound given in option $C$ forms the most stable carbocation after removal of $Cl.$ This carbocation is most stable due to resonance, hyperconjugation and $+I$ effect of methyl group so it will react easily.
The compound given in option $C$ forms the most stable carbocation after removal of $Cl.$ This carbocation is most stable due to resonance, hyperconjugation and $+I$ effect of methyl group so it will react easily.
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