In which of the following,addition of HBr doe | vedclass

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(C) The Anti-Markownikoff addition of $HBr$ (also known as the peroxide effect or Kharasch effect) is only observed in unsymmetrical alkenes.$But-2-en

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$But-2-ene$

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(C) The Anti-Markownikoff addition of $HBr$ (also known as the peroxide effect or Kharasch effect) is only observed in unsymmetrical alkenes.$But-2-ene$ $(CH_3-CH=CH-CH_3)$ is a symmetrical alkene.In a symmetrical alkene,the addition of $HBr$ results in the same product regardless of whether it follows Markownikoff's rule or the Anti-Markownikoff mechanism.Therefore,the Anti-Markownikoff addition is not observed for $But-2-ene$.

In which of the following,addition of $HBr$ does not take place against Markownikoff's rule,or for which is the Anti-Markownikoff addition of $HBr$ not observed?

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