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': 'Kussmaul respiration occurs in response to \nSelect and explain. \nA. Decrease in pH of blood, B. Increase in pH of blood, C. Obstructive pulmonary disease, D. Carbon monoxide poisoning', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]