This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nephrotic and Nephritic syndrome, Subject name: Medicine
[{'content': 'Most common cause of glomerulonephritis is? \nSelect and explain. \nA. Berger disease, B. Acute Glomerulonephritis, C. Chronic glomerulonephritis, D. Focal segmental Glomerulosclerosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Most common cause of glomerulonephritis is Berger disease. Focal segmental glomerulosclerosis is most common cause of nephrotic syndrome.', 'role': 'assistant'}]