The correct option is A the central nervous system and the peripheral nervous system.
Human nervous system consists of the central nervous system (CNS) and the peripheral nervous system (PNS).
CNS includes the brain and spinal cord. PNS comprises all the nerves of the body associated with the central nervous system. The nerve fibers of the peripheral nervous system are of two types: afferent and efferent fibers.
The peripheral nervous system is further divided into somatic nervous system and autonomic nervous system.
The autonomic nervous system consists of sympathetic and parasympathetic nervous system.