This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hypertension, Subject name: Medicine
Commonest cause of sustained severe hypertension in children: 
Select and explain. 
A. Endocrine causes, B. Coarctation of aorta, C. Renal parenchyma disease, D. Pheochromocytoma
C: Renal parenchyma disease
Answer: C: Renal parenchyma disease 
Explanation: 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