Justify the placement of O, S, Se, Te, and Po in the same group of the periodic table in terms of electronic configuration, oxidation state, and hydride formation.

Options

1. AThey all have the same number of valence electrons.
2. BThey exhibit similar bonding patterns and tendencies to form compounds.
3. CThey all belong to the same period.
4. DThey all form diatomic molecules in their elemental forms.