Correct option: C.conductors in the fused state
(c) conductors in the fused state
Explanation : Electrovalent compounds, or ionic compounds, consist of cations and anions held together by strong electrostatic forces known as ionic bonds. These compounds typically do not conduct electricity in their solid state because the ions are fixed in place within a crystalline lattice. However, when melted into a liquid (fused) state or dissolved in a polar solvent like water, the ions become free to move.