Explanation:

A Micro computer, also commonly known as a Personal Computer (PC), is specifically designed for individual use in homes, offices, and schools. These computers are relatively small, inexpensive, and have sufficient processing power for everyday tasks like word processing, internet browsing, and gaming. Option (a) Mini computer is a mid-range computer, larger and more powerful than a microcomputer, often used in small businesses or scientific applications. Option (b) Super computer is a high-performance machine used for complex scientific calculations, not personal use. Option (d) Mainframe computer is a large, powerful system used by large organizations for critical applications and bulk data processing. Thus, a Micro computer ($ \text{c} $) is the correct term for a personal-use computer.