The details printed on the rear of an electric room heater are: rating $220$-$240\,\text{V}$ $\sim 50\,\text{Hz}$ $4.2\,\text{A}$ What fuse rating would be appropriate for this room heater?
- A$4.0\,\text{A}$
- B$4.2\,\text{A}$
- C$5.0\,\text{A}$
- D$13.0\,\text{A}$