Q: What are the components of the human nervous system?  

Answer: A

The human nervous system is responsible for transmitting signals between different parts of the body and the brain. It comprises two main parts: the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS includes the brain and the spinal cord, while the PNS consists of all the nerves that connect the CNS to the rest of the body.
Option A is the correct answer because it includes both the CNS and the PNS, which are the two main components of the human nervous system. The CNS is responsible for processing and coordinating information, while the PNS is responsible for transmitting information between the CNS and the rest of the body.
Option B is incorrect because it only includes the CNS and the somatic nervous system, which is responsible for voluntary movement and sensory information. It does not include the PNS, which is responsible for involuntary functions such as digestion and breathing.
Option C is incorrect because it includes the sympathetic and parasympathetic nervous systems, which are part of the autonomic nervous system. The autonomic nervous system is responsible for regulating involuntary functions such as heart rate and blood pressure, but it is not one of the two main components of the human nervous system.
Option D is incorrect because it includes the autonomic and somatic nervous systems, but it does not include the central nervous system. The somatic nervous system is responsible for voluntary movement and sensory information, while the autonomic nervous system is responsible for regulating involuntary functions.
In conclusion, the correct answer is option A, which includes both the central nervous system and the peripheral nervous system. The CNS and the PNS work together to ensure the proper functioning of the human body.

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