This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System Pa 1, Subject name: Physiology
[{'content': 'Features of Chronic mountain sickness are all except \nSelect and explain. \nA. Hyperventilation, B. Increase erythropoietin, C. Increase in HCO3 excretion, D. Decrease in mitochondria', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Chronic mountain sickness: - - Occasionally, a person who remains at high altitude for too long experience chronic mountain sickness, in which the following effect occur- The red blood cell mass & hematocrit become exceptionally high due to chronic hypoxia (| in erythropoietin). The pulmonary aerial pressure become elevated due to | blood viscosity. The right side of hea become greatly enlarged as a result of pulmonary hypeension. The peripheral aerial pressure fall. Congestive hea failure ensues. Death often follow unless the person is moved to lower altitude.', 'role': 'assistant'}]