This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory, Subject name: Medicine
[{'content': 'Which of the following is contributory factor for developing Cor-pulmonale in chronic bronchitis \nSelect and explain. \nA. Hypoxia, B. Hypercapnea, C. Acidosis, D. Alkalosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (Hypoxia) (1453-54-H17th)COR- PULMONALE - denotes RV hypertrophy and eventual failure resulting from pulmonary disease and the attendent hypoxia or from pulmonary vascular diseaseEssentials of Diagnosis - Cor pulmonale* Symptoms and sign of chronic bronchitis and pulmonary emphysema* Elevated JVP, Parasternal lift, edema, hepatomegaly ascites* ECG shows tall, peaked P waves (P- pulmonale) right axis deviation, and RVH* Chest radiograph : enlarged RV and PA* Echocardiogram or radionuclide angiography excludes primary LV dysfunctions', 'role': 'assistant'}]