After being thrown off the back of a bull, a bull rider can move his arms but has loss of motor function in the lumbar and sacral segments of the spinal cord. This is referred to as:.

Paraplegia

Explanation:

Paraplegia is a Medical condition where injury in the spinal cord results into impairment of the nervous system that controls the lower limb. This results in numbness or partial paralysis of the limbs due to the loss of sensory function of the sacral segment of the spinal cord

the answer your looking for is c. : )