Which of the following classes pertains to combustible metals?

Class D fire extinguishers are specifically designed for combustible metals, which include materials such as magnesium, titanium, sodium, and potassium. These metals burn at very high temperatures and can react violently with water or common extinguishing agents found in other classes of fires. Therefore, Class D extinguishers use a dry powder that smothers the burning metal and prevents oxygen from reaching the fire, effectively extinguishing it.

Understanding the classification of fires is crucial for fire safety and emergency response, as it ensures that the correct extinguishing agents are used to combat different types of fires safely and effectively.