Which of the following is FALSE? (A) Each nerve fiber sits in a loose connective tissue called the endoneurium. (B) The axon and its associated glial cells form the nerve fiber. (C) The perineurium packages groups of nerve fibers together into bundles called fasiculi. (D) The epineurium is the innermost connective tissue covering.

The correct answer is option (D) "The epineurium is the innermost connective tissue covering".

Explanation:

The epineurium is the layer of connective tissue that surrounds nerve fascicles and blood vessels. The epineurium is not the innermost connective tissue, actually, it is the outermost layer of irregular connective tissue covering peripheral nerves. The epineurium lies between and around the secondary fascicles, and contributes to the microvascularization of nerves.