50 cm³ of sulphur (IV) oxide, 800 cm³ of ammonia, 450 cm³ of hydrogen chloride, 1.0 cm³ of at 15°C. Which of the following is suitable for demonstrating the fountain experiment?

• A Sulphur (IV) oxide hydrogen chloride
• B Carbon (IV) oxide and amonia
• C Amonia and hydrogen chloride
• D Carbon (IV) oxide and surphur (IV) oxide