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: Physiology
The only neurons in retina showing action potentials are 
Select and explain. 
A. Rods and cones, B. Bipolar cells, C. Amacrine cells, D. Ganglion cells
D: Ganglion cells
Answer: D: Ganglion cells 
Explanation: Ganglion cells are the only neurons in retina, that show action potential.