Toluol is converted to the benzoic acid under the following conditions: {# "img":"o1ygupgcqy5dtwui0kngofx1c.png", "alt":"Option","whb":"258:142:" #}

Answer options

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