Question: 47. The most stable carbocation among the following is :
Answer: Option (4)
Explanation:
The stability of a carbocation depends mainly on the number of alkyl groups attached to the positively charged carbon and the extent of hyperconjugation and inductive effect.
Carbocation stability order is:
\text{tertiary} > \text{secondary} > \text{primary}In option (4), the positive charge is present on a tertiary carbon inside a cyclohexyl ring with an additional methyl group,
which provides maximum hyperconjugation and a strong +I effect.
The other options involve either secondary or primary carbocations or
carbocations with fewer alkyl groups contributing to stabilization.
Therefore, the carbocation shown in option (4) is the most stable.