This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System, Subject name: Physiology
[{'content': 'Peripheral chemoreceptors are stimulated maximally by: \nSelect and explain. \nA. Cyanide, B. Anemia, C. Hypocapnia, D. Alkalosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. Cyanidea. "Carotid and aortic bodies can also be strongly stimulated by certain chemicals,b. particularly cyanide ion and other poisons of the metabolic respiratory chain." Cyanide produces histotoxic hypoxia of glomus cell. Hypoxia leads to closure of O2 sensitive K+ channel of glomus cell and stimulation.', 'role': 'assistant'}]