[sapta]

what's the order of preference for naming polyfunctional groups?particulaly the relative position of -SO3H acid &-COOH acid .
please include nitro,halo &alkene/alkynes in the list.                                                                                                                                                                                                                                                                                             NOTE:i found different books giving different positions.even the  same book(not the same edition) gave different information. so please try to give the latest list.