Typical machining operations are to be performed on hard-to-machine

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Typical machining operations are to be performed on hard-to-machine materials by using the processes listed below. Choose the best set of Operation- Process combinations
Operation
P. Deburring (internal surface)
Q. Die sinking
R. Fine hole drilling in thin sheets
S. Tool sharpening
Process
1. Plasma Arc Machining
2. Abrasive Flow Machining
3. Electric Discharge Machining
4. Ultrasonic Machining
5. Laser beam Machining
6. Electrochemical Grinding

1. P-1, Q-5, R-3, S-4
2. P-1, Q-4, R-1, 5-2
3. P-5, Q-1, R-2, S-6
4. P-2, Q-3, R-5, S-6

Correct Option: D

P–2, Q–3, R–5, 5–6