Incorrect statement  about oxoanions and oxoacids of 16th group is

SO3-2 ion is Pyramidal                                                                      Hybridisation of Sulphur is  sp3   (Option (3) is correct)No.of bond pairs = Attached atoms to central atom = 3No.of lonepairs = Electronpairs - Bond pairs = 4-3 =1Thus the central atom 'S' in Sulphite ion has3 bond pairs + 1 lone pair around itAccording to VSEPR theoryA bond pair can be single bond pair (or) double bond pair (or) triple bond pairOxidation state of 'S' in SO3-2 = +4Total bonds =4Attached atoms = σ bonds = 3 ;π bonds=4-3=1 ;The structure of SO3-2 will be structure of  SO4-2 will beBoth are stabilised through resonanceoption(2) ---  Down the group acidic strength of oxides & oxyacids decreases