Final answer:
The correct answer is that exposed metal frames of PV modules must be grounded and bonded with devices that are listed and identified for such use, ensuring safety and standard conformity.
Step-by-step explanation:
The exposed metal frames of photovoltaic (PV) modules must be grounded and bonded with devices that are listed and identified for such use. This means that the devices used for grounding and bonding must be recognized by an authoritative body and specifically designed for electrical installations in PV systems. It ensures both safety and conformity to standards. Grounding is essential to safeguard against electrical shocks and to ensure the system functions correctly.