Derice a series of reaction of convert benzene into metachlorobromobenzene. Select reagents and condition from the following table, listing then in the order of use.
(1) sulphuric acid (conc.) heat
(2) `Cl_2+FeCl_3` and heat
(3) `NaNO_2+H_2O^(+),0^@C`
(4) `H_2,(Pd)/(C)` catalyst ltbtgt (5) `Mg` in order
(6) `PBr_3`
(7) `H_3PO_2`
(8) `HNO_3(conc.)+H_2SO_4(conc.)` and heat
(9) `Cu_2Br_2+HBr`
(10) `(CH_3CO)_2O+` pyridine

Options

A. 8 then 2 then 4 then 3 then 9
B. 2 then 8 then 4 then 3 then 9
C. 8 then 4 then 10 then 2 then 3 then 9
D. 1 then 2 then 6

Answer

A

Explanation