Mica is mainly used in :

Mica is a naturally occurring mineral composed of a series of plates or leaves. It is considered one of the most indispensable minerals used in the electrical and electronic industries (Option D) due to its unique combination of physical, chemical, and thermal properties.

The primary reasons for its extensive use in these sectors include:

• Excellent Dielectric Strength: It can withstand high voltages without conducting electricity or breaking down.
• Low Power Loss Factor: It ensures minimal energy dissipation, which is crucial for high-frequency applications.
• Insulating Properties: It acts as a superior insulator against both heat and electricity.
• Thermal Stability: Mica can resist very high temperatures, making it ideal for use in capacitors, transistors, and heating elements.

According to NCERT and official mineral resources data, while mica has niche uses in cosmetics and paints, its primary industrial utility remains centered on electrical insulation and electronic components.