In a Nucleophilic substitution unimolecular $(S_{N} 1)$ reaction:

Formation of carbocation intermediate takes place.

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Formation of carbanion intermediate takes place.

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None of the above.

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Formation of free radical intermediate takes place.

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Solution

The correct option is A Formation of carbocation intermediate takes place.
Steps Involved in $(S_{N} 1)$ reaction:
1. Formation of carbocation intermediate:

2. Attack of nucleophile:

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