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
[{'content': "Most common cause of Hypertension in adults is - \nSelect and explain. \nA. Essential Hypertension, B. Pheochrmocytoma, C. Renal Artery' Stenosis, D. Chronic Glomerulonephritis", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Essential Hypertension o Most common cause of Hypertension in adults is Essential Hypertension.# Essential (primary or idiopathic) hypertension is the most common cause of hypertension in adolescents and adults.", 'role': 'assistant'}]