The spinal cord is made up of

Correct option is A

Ans (a)
Sol. Explanation:
· The spinal cord is primarily composed of neurons (nerve cells) and supporting glial cells. Neurons are responsible for transmitting electrical impulses between the brain and the rest of the body.
· Cardiac muscles are found in the heart, responsible for pumping blood.
· Smooth muscles are present in internal organs like the intestines and blood vessels.
· Striated muscles (skeletal muscles) are involved in voluntary body movements and are not part of the spinal cord.