Answer:
b. phantom-limb sensation.
Explanation:
This is the sensation that makes a person who has undergone amputation experience a certain feeling of the amputated part being present. The feeling may come in form of aches, twists etc. Phantom limb occurs in about 80 Percent of individuals who has some form of amputation.
This is common with people who have undergone varying degree of amputation. This sensation is believed to come from the brain and spinal cord.