JEE Main 2023 Chemistry question

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

• (A)Both aqueous acidic and neutral
• (B)Aqueous neutralCorrect
• (C)Both aqueous acidic and faintly alkaline
• (D)Aqueous acidic