Question

cns is to pns as oligodendrocytes are to
oligodendroglia.
glial cells.
schwann cells.
astrocytes.

Explanation:

CNS (central - nervous system) and PNS (peripheral - nervous system) are two parts of the nervous system. Oligodendrocytes are glial cells that myelinate axons in the CNS. Schwann cells are the equivalent glial cells that myelinate axons in the PNS, creating a parallel relationship similar to that of CNS and PNS.

Answer:

C. Schwann cells