A bundle of axons or dendrites bounded by connective tissue inside the CNS is:

Explanation

Option B is correct.A bundle of axons or dendrites bounded by connective tissue inside the central nervous system (CNS) is called a tract. Tracts are bundles of nerve fibers that transmit signals between different parts of the CNS. They are composed of axons or dendrites that are bundled together by connective tissue. The connective tissue helps to protect the axons or dendrites and to keep them organized. Tracts are named according to the regions of the CNS that they connect. For example, the corticospinal tract connects the cerebral cortex to the spinal cord. The tract is named corticospinal because it connects the cortex (the outer layer of the brain) to the spinal cord.