During the reaction of permanganate with thiosulphate, the change in oxidation of manganese occurs by value of 3. Identify which of the below medium will favour the reaction

The reaction of potassium permanganate with sodium thiosulfate gives sodium sulfate, potassium sulfate and insoluble manganese dioxide

KMnO₄​+Na₂​S₂​O₃​.5H₂​O→Na_2​SO₄​+K₂​SO_4​+MnO₂​

$\stackrel{+7}{\mathrm{Mn}}{\mathrm{O}}_4 \to \stackrel{+4}{\mathrm{Mn}}{\mathrm{O}}_2$

Change in oxidation state=3