Which of the following minerals is a silicate mineral?

The Feldspar minerals is a silicate mineral.

Silicate minerals, which include quartz, feldspar, mica, amphibole, pyroxene, and olivine, are the most prevalent kind of minerals on Earth. Silicate minerals are created by the chains, sheets, and frameworks that silicon and oxygen-containing tetrahedra called silica produce as well as by their interactions with other cations.

Hence, the option C is correct.