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Chemistry Question on reaction mechanism

The most stable carbonium ion among these is:

A

C6H5−CH2C+H2C _{6} H _{5}- CH _{2} \overset{+}{C}H _{2}

B

CH3C+H2CH _{3} \overset{+}{C}H _{2}

C

(C6H5)3−C+\left( C _{6} H _{5}\right)_{3}- \overset{+}{C}

D

C6H5C+H2C _{6} H _{5} \overset{+}{ C } H _{2}

Answer

(C6H5)3−C+\left( C _{6} H _{5}\right)_{3}- \overset{+}{C}

Explanation

Solution

Due to more possibility for delocalisation of (C6H5)2−C+−C6H5\left( C _{6} H _{5}\right)_{2}- \overset {+}C - C _{6} H _{5} because of presence of π−\pi- electrons in conjugation, (C6H5)2−C+−C6H5\left( C _{6} H _{5}\right)_{2}-\overset {+}{ C }- C _{6} H _{5} is the most stable ion.