Which of the following molecule gives sulphurous acid on hydrolysis

Halides formed by 16th group elements are….MF6, MX4, MX2, M2X2;Thermal stability…..F->Cl->Br->I- ;MF6…SF6,SeF6,TeF6….Inert due to steric reasons….Gases….sp3d2(6 bp)….octahedral….SF6….Insulator ;SF4…Gas….Fluorinating agent ; SeF4…Liquid ; TeF4…Solid ;MX4….See saw (or) distorted tetrahedral…sp3d(4 bp+ 1 lp) ;SCl4+4H2O→S(OH)4+4HCl ;S(OH)4→H2SO3+H2O ;MX2…angular…sp3(2 bp+2 lp) ; SCl2 and OF2…1020 ;M2X2….Non linear non planar molecule…open book structure…polar molecule;2Se2Cl2→SeCl4+3Se ….Disproportionation ;2Se+12Cl2→Se+4Cl4+Se ;0 EW of Se2Cl2=MTotal decrease in O.Sas oxidant+MTotal inrease in O.Sas reductant; EW of Se2Cl2=MTotal decrease in O.Sas oxidant+MTotal inrease in O.Sas reductant; EW of Se2Cl2=M2as oxidant+M6as reductant ;