D And F Block Elements

The correct answer is option (B): MnO
The most basic among the given oxide is MnO (Maangnanese (II) Oxide). Basicity is the ease with which the oxide can accept a proton and form hydroxide. The more basic the oxide is more it has the tendency to form hydroxide. In MnO, Mn is in +2 oxidation state, therefore it can readily react with water to form Mn(OH)₂ after accepting 2 protons. Therefore, the answer is MnO

The correct answer is option (C): IO₃^-
5KI+2KMnO₄ +H₂O → 5KIO₃ +2MnO₂ +6KOH In this reaction, KI reduces potassium permanganate to manganese dioxide (MnO₂). A KI is getting oxidized to potassium iodate. The oxygen is transferred from permanganate ions to iodine ions, thus resulting in the formation of iodate ions.