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': 'Presence of which of the following in the urine is diagnostic of glomerular injury: \nSelect and explain. \nA. 20% dysmoiphic RBC’s, B. Bright red cells, C. 100RBC per high power eld, D. Beta2 micro globulin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: “The RBC ’s of Glomerular origin are often Dysmorphic when examined by Phase contrast microscopy”\n“Hematuria with Dysmorphic RBC’s cast and protein excretion >500 mg /d is virtually diagnostic of Glomerulonephritis”.', 'role': 'assistant'}]