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
Which of the following is TRUE about propagated nerve action potential? 
Select and explain. 
A. Decremental, B. Not affected by hypoxia, C. Fastest in C fibers, D. Not affected by membrane capacitance
B: Not affected by hypoxia
Answer: B: Not affected by hypoxia 
Explanation: Acute and chronic hypoxias are associated with reduced nerve conduction velocity, neuronal action potential generation and axonal transport. In the central neurons, the reduction of nerve cell excitability in hypoxia is primarily because of increased K+ conductance. So, hypoxia also affects action potential. But compared to other statements, its can be the answer.