This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pharmacology
[{'content': 'Which of the following is NOT a frontline antihypertensive agent? \nSelect and explain. \nA. Enalapril, B. Hydrochlorthiazide, C. Amlodipine, D. Atenolol', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (D) Atenolol(Ref: CMDT-2014/429)*Beta blockers are no longer considered to be the first line antihypertensive agents. According to JNC-8, ACE inhibitors, calcium channel blockers and diuretics are first line agents.', 'role': 'assistant'}]