This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
[{'content': 'Blockade of vasomotor reversal(Re reversal) is seen with \nSelect and explain. \nA. Atenolol, B. Nor adrenaline, C. Dopamine, D. Epinephrine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Vasomotor re-reversal means only rise in BP is seen with adrenaline because of administration of beta blocker. Fall in BP is neutralized by beta blocker Ref: Katzung 12th ed.', 'role': 'assistant'}]