In the following aromatic compound, bromination in presence of $Fe$ occurs preferentially at which labelled positions? 
A1
B2
C3
DBoth 1 and 3
Answer & Solution
Correct answer: D. Both 1 and 3
The fused ring contains an alkoxy-type oxygen substituent attached to the aromatic system. Such a group donates electron density by resonance and is ortho/para directing in electrophilic aromatic substitution. Therefore the activated positions are 1 and 3, making option D correct.
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