Final answer:
The correct types of copper tubing used for gas supply are Type K, Type L, and Type M. These types vary in wall thickness and are selected based on application needs. Type K is commonly used underground, Type L for interior and exterior lines, and Type M is less common due to its thinner walls.
Step-by-step explanation:
The three types of copper tubing that can be used for gas supply are Type K, Type L, and Type M. These are not explicitly mentioned in the choices provided in the question, but based on standard industry nomenclature, Type K and L could be associated with choice a) G, K, and L if we are considering common types used in plumbing and gas applications.
Type K copper tubing has a thick wall and is commonly used for underground gas lines, while Type L is thinner but still suitable for both interior and exterior gas lines. Type M has the thinnest wall and is also used in residential applications, but it's less common for gas supply due to its thinner walls.
The materials mentioned such as water pipes, Gas & Fire Pipelines, and conduits are related because all these materials involve the transportation of fluids or gases and require the proper selection of materials based on application requirements. Copper tubes, when selected correctly, are suitable for these applications due to their properties as good conductors of heat, resistance to corrosion, and durability.