Question

central nervous system and perip
_ is to the cns; _ is/are to the pns.
brain; nerves
brain; spinal cord
ganglion; nerves
spinal cord; brain

Explanation:

The central nervous system (CNS) consists of the brain and spinal cord. The peripheral nervous system (PNS) is made up of nerves that extend from the CNS to the rest of the body. Ganglia are part of the PNS. So, the brain is to the CNS and nerves are to the PNS.

Answer:

Brain; nerves