What are the 4 types of fire extinguishers are there

A-paper, wood, cardboard, and most plastics

B-flammable or combustible liquids such as gasoline, kerosene, grease and oil

C-electrical equipment, such as appliances, wiring, circuit breakers and outlets

D - chemical stuff (like a lab) They are for fires that involve combustible metals, such as magnesium, titanium, potassium and sodium.

I believe there is a K too - involve cooking oils, trans-fats, or fats in cooking appliances and are typically found in restaurant and cafeteria kitchens.