Final answer:
The authority that must approve PMDs with 'V' devices is the CDRH, which is a branch of the FDA responsible for the premarket approval of medical devices.
Step-by-step explanation:
The authority that must approve PMDs (Prescription Medical Devices) with "V" devices is the Center for Devices and Radiological Health (CDRH), which is a branch of the FDA (Food and Drug Administration).
CDRH is responsible for the premarket approval of all medical devices, as well as overseeing their manufacturing, performance, and safety. This includes both simple devices like a toothbrush and complex devices like implantable brain pacemakers.
Therefore, any PMDs with "V" devices must be approved by the CDRH within the FDA.