
In the above conversion the correct sequence of reagents to be added is
(1) (i) Fe/H+, (ii) HONO, (iii) CuCl, (iv) KMnO4, (v) Br2
(2) (i) KMnO4, (ii) Br2/Fe, (iii) Fe/H+, (iv) Cl2
(3) (i) Br2/Fe, (ii) Fe/H+, (iii) HONO, (iv) CuCl, (v) KMnO4
(4) Br2/Fe, (ii) Fe/H+, (iii) KMnO4, (iv) Cl2