In discussing descending pathways, we talked about neurons whose conductile processes are in the internal capsule. these neurons:
a. have their cell bodies in the dorsal horn of the spinal cord
b. have their cell bodies in the precentral gyrus of the cerebral cortex
c. have their cell bodies in the ventral horn of the spinal cord
d. have their cell bodies in the postcentral gyrus of the cerebral cortex

The correct answer will be option B.

Explanation:

The descending pathway or descending tract is a nervous system which is composed of upper motor neurons which carries the signals from the CNS (brain) to lower neurons.

These upper motor neurons originate in the cerebral cortex of the brain especially "precentral gyrus" or depressions of the cerebrum with their cell bodies in it and axons in the CNS. They pass the impulses via corticospinal tract in which neurons converge and descend through internal capsula.

Thus, option B is the correct answer.