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
[{'content': 'Peripheral Chemoreceptor is maximally stiumulated by \nSelect and explain. \nA. Hypoxic hypoxia, B. Stagnant hypoxia, C. Histotoxic hypoxia, D. Anaemic hypoxia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cyanide (Histotoxic hypoxia) can directly and maximally stimulate peripheral chemoreceptor.', 'role': 'assistant'}]