The stability of the carbocation decreases in the order:

R_{2} C H^{+} > R_{3} C^{+} > R C H_{2}^{+} > C H_{3}^{+}

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R_{3} C^{+} > R_{2} C H^{+} > R C H_{2}^{+} > C H_{3}^{+}

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C H_{3}^{+} > R_{2} C H^{+} > R C H_{2}^{+} > R_{3} C^{+}

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C H_{3}^{+} > R C H_{2}^{+} > R_{2} C H^{+} > R_{3} C^{+}

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Solution

The correct option is B $R_{3} C^{+} > R_{2} C H^{+} > R C H_{2}^{+} > C H_{3}^{+}$
The carbocation with a maximum number of alkyl groups (-R) is more stable because of $+ I$ effect. Order of stability of carbocation is $3^{o} > 2^{o} > 1^{o} >$ methyl . And also $3^{o}$ carbocation has the highest hyperconjugative structures.

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is in the order of

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