NEET 2022 Chemistry question on Periodic Classification

1. A.
   Alkali metals react with water to form their hydroxides.
2. B.
   The oxidation number of K in $\text{KO}_2$ is +4.
3. C.
   Ionisation enthalpy of alkali metals decreases from top to bottom in the group.
4. D.
   Lithium is the strongest reducing agent among the alkali metals.

[NEET 2022]