The question displayed in the image is: **"In oxy fuel gas cutting, metal cutting takes place due to"** Options: 1. Oxidation of metal 2. Melting of metal 3. Both A and B 4. None of the above ### Correct Answer: **Oxidation of metal** **Explanation:** In oxy-fuel gas cutting, the primary mechanism for cutting metal is the chemical reaction between oxygen and the metal (oxidation), which produces heat and forms metal oxides that are blown away by the oxygen jet. The metal is preheated to its ignition temperature and then oxidized. Melting plays a minor role, but the main process is **oxidation**, not simple melting. So, the correct answer is: **Oxidation of metal** (Option 1)