This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Medicine
[{'content': "Presence of which of the following in the urine is diagnostic of glomerular injury- \nSelect and explain. \nA. Bright red cells, B. 20% dysmorphic RBC's, C. 100RBC per high power field, D. Beta 2 micro globulin", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Glomerular injury is characterised by the presence of RBC casts & dysmorphic erythrocytes in urine microscopy. Ref Harrison20th edition pg 292', 'role': 'assistant'}]