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Which of the following is not the product of dehydration of 
?
?
A
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B
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C
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D
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Detailed Solution
Dehydration proceeds through the tertiary carbocation on the side-chain carbon; it is already stable, so no rearrangement occurs.
Alkenes can only form by loss of $H^+$ from carbons next to this cation, so the product with the double bond inside the ring away from that carbon is not possible.
Alkenes can only form by loss of $H^+$ from carbons next to this cation, so the product with the double bond inside the ring away from that carbon is not possible.