নিম্নলিখিত কোনটি ইলেক্ট্রোফিলিক সংযোজন বিক্রিয়া?

1
CH3CH = CH2 + HBr → CH3CH(Br)CH3
2
\(CH_3CH=CH_2+HBr\xrightarrow{peroxide}CH_3CH_2Br\)
3
\(C_6H_6+Cl_2\xrightarrow[AlCl_{3}]{Anhydraes}C_6H_5Cl\)
4
\(C_6H_6+Cl_2\xrightarrow[AlCl_{3}]{Anhydraes}C_6H_5Cl+HCl \)

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