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': 'Hyperventilation in high altitude is due to \nSelect and explain. \nA. Respiratory alkalosis, B. Respiratory acidosis, C. Hypercapnea, D. Decreased concentration of bicarbonate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Hyperventilation in high altitude is due to respiratory alkalosis Ref: guyton and hall textbook of medical physiology 12 edition page number:375,376,377', 'role': 'assistant'}]