CONNECTIVE TISSUE SHEATHS OF THE NERVE TRUNK: a. endoneurium b . perineurium C exoneurium d ectoneurium e epineurium

The correct answer is e. epineurium.The epineurium is the outermost layer of connective tissue that surrounds the entire nerve trunk. It provides structural support and protection to the nerve fibers within.The other options are incorrect:a. Endoneurium: This is the innermost layer of connective tissue that surrounds individual nerve fibers within a nerve.b. Perineurium: This is a layer of connective tissue that surrounds a bundle of nerve fibers, known as a fascicle, within a nerve.c. Exoneurium: This term is not commonly used in anatomy and does not refer to a specific connective tissue sheath of the nerve trunk.d. Ectoneurium: This term is not commonly used in anatomy and does not refer to a specific connective tissue sheath of the nerve trunk.Therefore, the correct answer is e. epineurium, which is the outermost layer of connective tissue that surrounds the entire nerve trunk.