Multiple Sclerosis is a demyelinating disease affecting axons in the nervous system, in contrast to Guillain Barre Syndrome, which strips the myelin sheath from axons in the nervous system.
a. brainstem, pons
b. PNS, CNS
c. the spinal cord, thalamus
d. CNS, PNS

The preferable option will be - D.

D. CNS and PNS

Explanation:

Multiple Sclerosis is a demyelinating disease affecting axons in the CNS nervous system, in contrast to Guillain Barre Syndrome, which strips the myelin sheath from axons in the PNS nervous system.

answer; a male inherits only one allele of the x-linked gene controlling hair color;

a community that experiences major changes undergoes progress