C-10-Q087mediumsingle_mcqঅলিয়ামের সংকেত—aH2S2O7\mathrm{H_2S_2O_7}H2S2O7bH2SO4\mathrm{H_2SO_4}H2SO4cSO3\mathrm{SO_3}SO3dH2SO3\mathrm{H_2SO_3}H2SO3