This group of alumino-silicate minerals is widely used in making electrical insulators A. Bauxite B. Chromite C. Manganese D. Mica

The correct answer is D. Mica.

Mica is a group of alumino-silicate minerals that are widely used in making electrical insulators. It is a sheet-like mineral that is transparent to light and has excellent electrical insulation properties. Mica is also used in a variety of other applications, including roofing, cosmetics, and electronics.

Bauxite is an ore of aluminum that is used to make aluminum metal. Chromite is an ore