Which of the following fire extinguishing agents is suitable for Type B fires?

For Type B fires, which involve flammable liquids such as gasoline, oil, and grease, carbon dioxide is particularly effective. This agent works by displacing oxygen in the vicinity of the fire, thus suffocating the flames while not leaving any residue that could lead to further complications or damage.

In contrast, other agents may not be suitable for Type B fires. For example, water can exacerbate these types of fires because it can cause flammable liquids to spread. Similarly, while multipurpose dry chemical agents can extinguish Type B fires, they may not be specifically designed for them and might not always work as effectively as carbon dioxide does in this particular scenario. Wet chemical agents are primarily intended for Type K fires, commonly associated with cooking oils and fats, rather than Type B fires. Therefore, carbon dioxide is the most appropriate choice among the options provided for addressing Type B fires.