Assertion : Fredel - craft reaction between benzene and acetic anhydride in the presence of anhydrous `AlCl_(3)` yields acetophenone and not poly - substituted products .
Reasons : Acetophenone formed poisons the catalyst preventing further reaction.

Options

A. If both assertion and reason are correct and reason is correct explanation for assertion.
B. If both assertion and reason are correct but reason is not correct explanation for assertion.
C. If assertion is correct but a reason is incorrect.
D. If assertion and reason both are incorrect.