<prompt> Commonest cause of systemic hypeension in children is -Coarctation of aoaAcute glomeurlonephritisNephrotic syndormeCongenital adrenal hyperplasia  <response>: Ans. is b i.e., Acute glomerulonephritis o None of the option is correct because most common cause is chronic glomieulonephritis. o But, amongst the given options acute glomerulonephritis is the most common disease that progresses to chronic glomerulonephritis. 