There is a fuse box on fire. You should use a fire extinguisher labeled:

Using an extinguisher labeled "ABC" is appropriate for a fuse box on fire because ABC extinguishers are designed to handle multiple types of fires, including those involving ordinary combustibles (like wood and paper), flammable liquids, and electrical equipment. The "C" in ABC indicates that it is safe to use on electrical fires, which makes it ideal for situations involving a fuse box.

The other options do not provide the same level of protection. "D" extinguishers are meant for combustible metals, which would not be applicable to electrical fires. "E" is not a standard classification and may refer to an extinguisher specification that is not commonly recognized. "K" extinguishers are specifically designed for kitchen fires, primarily those involving cooking oils and fats, and are not suitable for electrical fires. Hence, using an ABC extinguisher is the best choice for safely dealing with a fire in a fuse box.