Correct option is A
Diamond grinding wheels are made with
industrial-grade diamond abrasives, which are
extremely hard and durable. To dress and maintain their cutting efficiency, they require a
dressing tool that is harder or equally hard. The best tool for dressing a
diamond grinding wheel is another
diamond tool, commonly known as a
diamond dresser.
Dressing is essential because it
removes debris, exposes fresh cutting edges, and restores the wheel shape for precise grinding performance.
