Answer:

The correct option is b) a 13A fuse is the most appropriate value to use

Explanation:

Describing the relationship between the fuse rating and the fuse rating.

Here, $F R$ is the fuse rating $P$ is the power, and $V$ is the voltage. Substitute $1 K W$ for $P$ and $250 V$ for $V$ to find the fuse rating.
$$
\begin{aligned}
&F R=1.25 \frac{1 K W \times \frac{1000 W}{1 K W}}{250 V} \\
&F R=5 A
\end{aligned}
$$
Therefore, the fuse rating is $5 A$.
Thus, a $13 A$ fuse is the most appropriate value to use.