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Dinesh khalmaniya 1
option A
more the hyperconjugation, more is the rate of Electrophilic addition reaction as the nucleophilicity of alkene increase
here number of alpha H are 2,9,8,3 in option i,ii,iii,iv respectively
option iii have maximum number of alpha H i e., 9 so it has maximum number of h6perconjugating structure makes it more nucleophilic for the attack of electrophile
so the order is II>III>IV>I
option A is absolutely correct