same periodic group and share chemical properties

28. S and O are in the same periodic group and share chemical properties, but H2S is a gas at room temperature, following is the main reason for this?

a. H2S has stronger ionic bonds than H2O
b. H2S has stronger intramolecular bonds than H2O
c. H2O has stronger ionic bonds than H2S
d. H2O has stronger intramolecular bonds than H2S