Fire Extinguisher Installation What Are The Classes Of Fire Extinguisher?

What are the classes of fire extinguisher? - fire extinguisher installation

I know that class A for wood fires, Class B of gasoline and grease fires, and Class C is for electrical fires. But what of the Class D fire extinguisher? Please help I have a test tomorrow on this issue. I also know that a class ABC fire extinguisher for all 3 types can be used by fire, it is true that the D can be used for all types of fires? Or is there a certain way?