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': 'A child comes with hematuria following respiratory tract infection. He gives similar history about 5-10 months back also. All are true, except - \nSelect and explain. \nA. C3 complement level normal, B. Progressive renal failure with each attack, C. Biopsy shows focal and diffuse proliferative change in 50% of patient, D. Anti streptococcal antibody titre may not rise after each attack', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Hematuria is defined as the presence of red blood cells in the urine originating from the kidney or the urinary tract Underlying conditions producing hematuria, like diabetes, can be associated with progressive decline in kidney function in the setting of CKD Ref Harrison20th edition pg 278', 'role': 'assistant'}]