<prompt> Commonest cause of sustained severe hypertension in children:Endocrine causesCoarctation of aortaRenal parenchyma diseasePheochromocytoma  <response>: Ans. is c Renal parenchymal disease Most common cause of persistent hypertension in child is - Intrinsic Renal DiseaseIntrinsic renal diseases causing persistent hypertensionChronic glomerulonephritis Most common.Chronic pyelonephritisObstructive uropathyRenal tumours 