Final answer:
The most appropriate type of fire extinguisher for combustible ordinary materials is a Dry powder extinguisher.
Step-by-step explanation:
The most appropriate type of fire extinguisher for combustible ordinary materials is a Dry powder extinguisher. Dry powder fire extinguishers are effective for extinguishing fires caused by ordinary combustible materials such as wood, paper, cloth, and some plastics. They work by interrupting the chemical reaction that sustains a fire and creating a barrier between the fuel and the oxygen.