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: Medicine
[{'content': 'True about primary pulmonary hypoventilation is \nSelect and explain. \nA. Does not respond to chemical stimuli, B. Hypocapnoea and normal PaO2, C. Common in children, D. Respiratory alkalosis is diagnostic', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]