Explanation:

Ionic and covalent bonds are two types of chemical bonds.

Ionic bonds occur between a metal and a non-metal, where electrons are transferred from the metal to the non-metal, resulting in the formation of positively charged cations and negatively charged anions. These oppositely charged ions are held together by strong electrostatic forces.

Covalent bonds occur between two non-metals, where electrons are shared between the atoms. This sharing of electrons creates a bond between the atoms, resulting in the formation of a molecule.

Among the given options, the compound KCN (potassium cyanide) contains both ionic and covalent bonds.

- KCN consists of the metal potassium (K) and the non-metal cyanide (CN).

- The bond between potassium and cyanide is ionic because potassium is a metal and tends to lose one electron to form a cation, while cyanide is a non-metal and tends to gain one electron to form an anion.

- As a result, the potassium atom donates one electron to the cyanide ion, forming the ionic bond.

- However, the cyanide ion (CN-) contains a covalent bond between carbon and nitrogen.

- Carbon and nitrogen are both non-metals and share electrons to form a stable molecule.

Therefore, KCN contains both ionic and covalent bonds.