This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Arrhythmias, Subject name: Medicine
[{'content': 'Which of the follow ing is cause of RBBB ? \nSelect and explain. \nA. It can occur in a normal person, B. Pulmonary embolism, C. Corpulmonale, D. All of the above', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 4d' i.e.. All of the above Causes of RBBBNormal physiologicalPulmonary embolism/corpulmonalePulmonary artery hypertensionASDRheumatic heart disease", 'role': 'assistant'}]