Which ONE of the following options CORRECTLY matches the machining process and associated predominant material removal mechanism?
| Advanced machining process | Predominant material removal mechanism |
|---|
| P | Laser beam machining | 1 | Impact based erosion |
| Q | Abrasive waterjet machining | 2 | Sputtering |
| R | Ion beam machining | 3 | Melting and vaporization |
| S | Mechanical milling | 4 | Shearing |