Correct option is C
In the electrochemical grinding (ECG) process, the material removal rate (MRR) is inversely proportional to the density of the workpiece material. This is because the ECG process relies on the electrochemical dissolution of the material, and materials with higher density tend to dissolve at a slower rate, leading to a lower MRR. The process is a combination of electrochemical and mechanical grinding, making it suitable for removing material from hard and tough materials.
