Which of the following compounds undergoes hydrolysis easily?

$A$ sulphate of a metal $(A)$ on heating evolves two gases $(B)$ and $(C)$ and an oxide $(D).$ Gas $(B)$ turns $K_2Cr_2O_7$ paper green while gas $(C)$ forms a trimer in which there is no $S-S$ bond. Compound $(D)$ with $HCl$ reacts to form a compound $(E)$ which exists as a dimer. Compounds $(A)$,$(B)$,$(C)$,$(D)$ and $(E)$ are respectively:

Given below are two statements:
Statement-$I$: $\alpha$ and $\beta$ forms of sulphur can change reversibly between themselves with slow heating or slow cooling.
Statement-$II$: At room temperature the stable crystalline form of sulphur is monoclinic sulphur.
In the light of the above statements,choose the correct answer from the options given below:

What is obtained by the reaction of $SO_2$ with an aqueous solution of sodium hydroxide?

In the contact process for the production of $H_2SO_4$,which catalyst is required to convert $SO_2$ into $SO_3$?

Assertion: The reaction between $SO_2$ and $H_2S$ in the presence of $Fe_2O_3$ catalyst gives elemental sulfur.
Reason: $SO_2$ is a reducing agent.