Q.

In the above conversion of compound (X) to product (Y), the sequence of reagents to be used will be:       [2023]
 

1 (i)Fe,H+  (ii)Br2(aq)  (iii)HNO2  (iv)CuBr  
2 (i)Fe,H+  (ii)Br2(aq)  (iii)HNO2  (iv)H3PO2  
3 (i)Br2,Fe  (ii)Fe,H+  (iii)LiAlH4  
4 (i)Br2(aq)  (ii)LiAlH4  (iii)H3O+  

Ans.

(2)