Assertion `:` Alkyl benzene is not prepared by Friedel`-` Crafts alkylation of benzene.
Reason `:` Alkyl halides are more reactive than acyl halides.

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion
B. If both assertion and reason are true but reason is not the correct explanation of the assertion
C. if assertion is true but reason is false
D. If assertion and reason both are false

Answer

B

Explanation

The alkyl benzene is not prepared by Friedel -Craft's alkylation of benzene because the monoalkyl product formed undergo alkylation to produce polyalkylated benzene . The reason the alkyl halides are less reactive than acylhalides is also correct but this is not the correct explanation of assertion