Toluol is converted to the benzoic acid under the following conditions: {# "img":"x3e7op3eh6dltsbe4iub7w6y2.png", "alt":"Option","whb":"250:138:" #}

Answer options

1. Oxidation with potassium permanganate
2. Hydrogen peroxide action at a room temperature
3. Sodium hydroxide action at a room temperature
4. Heating with sulphuric acid
5. Boiling in the open air