Question

postganglionic axons are
multiple choice
myelinated.
unmyelinated.
sometimes myelinated and sometimes unmyelinated.

Explanation:

In the autonomic nervous system, postganglionic axons of the sympathetic nervous system are mostly myelinated (but with a thin myelin sheath), and postganglionic axons of the parasympathetic nervous system are unmyelinated. Overall, postganglionic axons can be sometimes myelinated (sympathetic postganglionic, thinly myelinated) and sometimes unmyelinated (parasympathetic postganglionic). So the correct option is the one stating they are sometimes myelinated and sometimes unmyelinated.

Answer:

C. sometimes myelinated and sometimes unmyelinated (assuming the options are labeled A, B, C with A: myelinated, B: unmyelinated, C: sometimes myelinated and sometimes unmyelinated as per the third option)