In this reaction:
- H$_2$S is oxidized to sulphur, indicating that H$_2$S acts as a reducing agent.
- SO$_2$ is reduced to water, indicating that SO$_2$ acts as an oxidizing agent.
This makes SO$_2$ the oxidizing agent and H$_2$S the reducing agent.
Given below are two statements:
Statement (I): The first ionization energy of Pb is greater than that of Sn.
Statement (II): The first ionization energy of Ge is greater than that of Si.
In light of the above statements, choose the correct answer from the options given below: