Where exposed and subject to physical damage, PV array equipment grounding conductors smaller than 4 AWG must be protected by raceway or cable armor.
See answer and applicable Code reference
The correct answer is: b) False
The provisions of Art. 690 apply to solar photovoltaic (PV) electric systems. The grounding requirements for PV systems are outlined in Part V of this Article. As per Sec. 690.46, "Equipment grounding conductor