Within the autonomic nervous system, preganglionic fibers leave the CNS and then synapse on postganglionic synapses. Thus, the correct option is A.
What is the Autonomic nervous system?
The autonomic nervous system may be characterized as a command system that performs largely unconsciously and controls bodily operations, such as the heart rate, digestion, respiration, etc.
The autonomic nervous system regulates the function by operating the information at the preganglionic fibers which then leave the central nervous system of the body and then synapse on the postganglionic synapses of the peripheral nervous system.
Therefore, within the autonomic nervous system, preganglionic fibers leave the CNS and then synapse on postganglionic synapses. Thus, the correct option is A.
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