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': 'Which of the following is the cause of RBBB? \nSelect and explain. \nA. It can occur in a normal person, B. Pulmonary embolism, C. Cor pulmonale, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Causes of RBBB \n\nNormal physiological\nPulmonary embolism/corpulmonale\nPulmonary artery hypertension\nASD\nRheumac heart disease', 'role': 'assistant'}]