Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Permanganate ion ( MnO ₄^- ) is a much stronger oxidizing agent than perrhenate ion ( ReO ₄^- ). Reason R : The stability of the +7 oxidation state increases down the group from Mn to Re in the transition series. In the light of the above statements, choose the correct answer from the options given belo

Step-by-step solution

In the d-block elements, the stability of higher oxidation states increases down the group. For Group 7, the +7 oxidation state is much more stable for heavier elements like Rhenium ( Re ) compared to Manganese ( Mn ). Because Mn ( VII ) is relatively less stable, it has a strong tendency to get reduced to lower oxidation states (like +2 or +4 ), making the permanganate ion ( MnO ₄^- ) a very strong oxidizing agent. In contrast, Re ( VII ) in the perrhenate ion ( ReO ₄^- ) is highly stable and lacks strong oxidizin