The order of decreasing priority for some functional group is-COOH>…A…>-COOR(R= alkyl group )>-COCl>-CONH2>-CN>-HC=O>C=O>…B…Here, A and B respectively refer to

A=-SO3H,B=-OHThe order of decreasing priority for some functional groups is : -COOH,-SO3H,-COOR(R= alkyl group ) -COCl,-CONH2,-CN,-HC=O,>C=O,-OH, -NH2,>C=C<,-C≡C-