Hydrides are compounds that contain hydrogen combined with other elements. They can be classified based on their properties and bonding nature. The correct classification for hydrides is option C - ionic, covalent, and metallic. Let's explore each classification in detail.

Ionic Hydrides:
Ionic hydrides are formed when hydrogen reacts with highly electropositive elements such as alkali metals (Group 1) and alkaline earth metals (Group 2) on the periodic table. In these compounds, hydrogen donates its electron to the metal, forming a hydride ion (H^-). These hydride ions are then surrounded by cations, resulting in a crystal lattice structure. Ionic hydrides are typically non-volatile, high-melting solids with high boiling points.

Covalent Hydrides:
Covalent hydrides are formed when hydrogen reacts with nonmetals. In these compounds, hydrogen shares electrons with the nonmetal, resulting in the formation of covalent bonds. Covalent hydrides can be further divided into two categories: molecular and network covalent hydrides.

Molecular Hydrides:
Molecular hydrides are formed when hydrogen combines with nonmetals such as carbon, nitrogen, oxygen, and halogens. These compounds exist as discrete molecules held together by intermolecular forces. Molecular hydrides often have low melting and boiling points and are usually gases or volatile liquids.

Network Covalent Hydrides:
Network covalent hydrides are formed when hydrogen combines with nonmetals like silicon and boron. In these compounds, the atoms are bonded together in a three-dimensional network structure, similar to diamond or quartz. Network covalent hydrides have high melting and boiling points and are typically hard solids.

Metallic Hydrides:
Metallic hydrides are formed when hydrogen reacts with transition metals. In these compounds, hydrogen atoms occupy interstitial sites within the metal lattice. Metallic hydrides exhibit metallic properties such as electrical conductivity and metallic luster.

In conclusion, hydrides can be classified as ionic, covalent, and metallic based on their bonding nature. Ionic hydrides involve the donation of electrons from hydrogen to a metal, covalent hydrides involve the sharing of electrons with nonmetals, and metallic hydrides involve the occupation of interstitial sites within metal lattices.