A) Oxygen and Hydrogen
B) Oxygen, Hydrogen, Acetylene
C) Oxygen and Argon
D) Oxygen and Acetylene
🧠 Explanation:
- Gases commonly used in welding include oxygen, acetylene, and argon.
- Oxygen and acetylene are often used together in gas welding to produce a high-temperature flame.
- Argon is used as a shielding gas in processes like TIG and MIG welding to prevent oxidation.