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': 'Drug not to be given in ischemic heart disease is: \nSelect and explain. \nA. Atenolol, B. ACE inhibitor, C. Isoproterenol, D. Streptokinase', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (C) Isoproterenol(Ref: KDT 8/e p585)Isoproterenol is a b adrenergic agonist and is C/I in IHD as it can increase myocardial oxygen demand by causing tachycardia.', 'role': 'assistant'}]