Which of the following compounds will give racemic mixture on nucleophillic substitution by `OH^(-)` ion?

Which of the following compounds will give racemic mixture on nucleophilic substitution by OH^(-) ion? (I) CH_3-underset(C_2H_5)underset(|)"CH"-Br (II) CH_3-underset(C_2H_5)underset(|)overset(Br)overset(|)C-CH_3

Which of the following compounds will give racemic mixture on nucleophilic substitution by OH^(-) ion? (I) CH_(3)-underset(C_(2)H_(5))underset(|)(C)H-Br (II) CH_(3)-underset(C_(2)H_(5))underset(|)overset(Br)overset(|)(C)-CH_(3) (III) CH_(3)-underset(C_(2)H_(5))underset(|)(C)H-CH_(2)Br

Which of the following compounds will give racemic mixture on nucleophilic substitution by OH^(-) ion? I) CH_(3) - underset(C_(2)H_(5))underset(|)CH-Br , (ii) CH_(3) - overset(Br) overset(|)underset(C_(2)H_(5))underset(|)C -CH_(3) , (iii) CH_(3)- underset(C_(2)H_(5))underset(|)CH-CH_(2)Br