Task: Question Answering
Input (English): Question: In the reaction of methoxybenzene with acetic anhydride and aluminum trichloride followed by treatment with an aqueous solution of hydrochloric acid is formed mainly: 
 Options:  <1> 4-methoxybenzoic acid. <2> 1- (4-methoxyphenyl) ethanone. <3> 1- (3-methoxyphenyl) ethanone. <4> 3-methoxybenzoic acid. <5> 4-methoxyphenyl acetate.
Output (English): 2