Final answer:
The correct root operation term in ICD-10-PCS for the removal of a cardiac pacemaker is 'D) removal'. This term is used specifically when a device is taken out from the body.
Step-by-step explanation:
The correct root operation term used in ICD-10-PCS for the removal of a cardiac pacemaker is D) removal. The term 'removal' is used when the objective of the procedure is to take out or off a device from a body part. In the case of a cardiac pacemaker, if the entire device is taken out, the correct term would be 'removal'. If the procedure involved was simply replacing the pacemaker, the correct term might be 'change' or 'revision', but for the complete extraction of the device, 'removal' is accurate.