This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Psychological antagonist is found in \nSelect and explain. \nA. Isoprenaline and sulbutamol, B. Isoprenaline and adrenaline, C. Isoprenaline and propranolol, D. Adrenaline and histamine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: (Ref Katzung 12/e p20) Physiological antagonists are those drugs that produce opposite action by acting on different receptors. Adrenaline reverses the bronchoconstrictor action of histamine (. H1 receptors) by causing bronchodilation (through beta2 receptors). Therefore,these are physiological antagonists.', 'role': 'assistant'}]