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': 'Circulatory shock is an example of \nSelect and explain. \nA. Hypoxic Hypoxia, B. Stagnant Hypoxia, C. Histotoxic Hypoxia, D. Anemic Hypoxia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]