Which of the following reactions is correct?

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(C) Let us analyze each reaction:$1$. Styrene $(C_6H_5CH=CH_2)$ reacts with $Br_2/CCl_4$ via electrophilic addition to the double bond,not electrophil

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(C) Let us analyze each reaction:$1$. Styrene $(C_6H_5CH=CH_2)$ reacts with $Br_2/CCl_4$ via electrophilic addition to the double bond,not electrophilic aromatic substitution. The product should be $1,2-$dibromoethylbenzene. Thus,option $A$ is incorrect.$2$. Aniline is highly activated. Reaction with $Br_2$ in a non-polar solvent like $CS_2$ at low temperature yields mono-substitution (ortho or para),not $2,4,6-$tribromoaniline. Thus,option $B$ is incorrect.$3$. Phenol reacts with concentrated $HNO_3$ in the presence of concentrated $H_2SO_4$ to undergo nitration at the ortho and para positions,yielding $2,4,6-$trinitrophenol (picric acid). This reaction is correct.Since only option $C$ is chemically accurate,the question likely intended to ask for the correct reaction among the choices provided. Given the options,$C$ is the only scientifically correct transformation.

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