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
Peripheral Chemoreceptor is maximally stiumulated by 
Select and explain. 
A. Hypoxic hypoxia, B. Stagnant hypoxia, C. Histotoxic hypoxia, D. Anaemic hypoxia
C: Histotoxic hypoxia
Answer: C: Histotoxic hypoxia 
Explanation: Cyanide (Histotoxic hypoxia) can directly and maximally stimulate peripheral chemoreceptor.