When solid sodium bromide is reacted with concentrated sulfuric acid, a mixture of gases is produced via both acid-base and redox pathways. Which of the following gases is a reduction product of sulfuric acid in this reaction?
SO2\text{SO}_2SO2
HBr\text{HBr}HBr
H2S\text{H}_2\text{S}H2S
Br2\text{Br}_2Br2