This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
The location of the cell bodies of the only neurons in the retina whose axons exhibit a self-propagated action potential is in which of the following layer? 
Select and explain. 
A. Ganglion cell layer, B. Inner plexiform layer, C. Inner nuclear layer, D. Outer plexiform layer
A: Ganglion cell layer
Answer: A: Ganglion cell layer 
Explanation: The only cell type in the retina that has long axons which exhibit a self-propagated action potential is the ganglion cell.