"Xiao" is a surname widely utilized in China. This originated from the locals of the Xiao County in the Anhui province in China, eventually adopting their town's name as their surname. The name escalated quickly in usage and is currently among the 20 most used Chinese surnames in the world.
The actual corect choice isn't listed here because it's actually the peripheral nervous system,, but I suppose the correct answer for your given choices would be the central nervous system.
The peripheral nervous system refers to the parts of the nervous system that are outside the central nervous system, that is, those outside the brain and spinal cord.
