Q.

The correct sequence of reagents for the above conversion of X to Y is:            [2026]

1 (i) Jones reagent (ii) NaOEt (iii) Hot KMnO4 / KOH  
2 (i) B2H6/H2O2 (ii) NaOEt (iii) Jones reagent  
3 (i) NaOH (aq) (ii) Jones reagent (iii) H3O+  
4 (i) NaOEt (ii) B2H6/H2O2 (iii) Jones reagent  

Ans.

(4)