This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Nitroglycerine causes all, EXCEPT: \nSelect and explain. \nA. Hypotension and Bradycardia, B. Methamoglobinemia, C. Hypotension and Tachycardia, D. Vasodilatation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Nitroglycerin is predominantly a venodilator. With large doses of NTG, a significant fall in blood pressure and a reflux sympathetic activation resulting in tachycardia occurs. Ref: KDT 6th Edition, Page 523; Essentials of Medical Pharmacology By K D Tripathi, 5th Edition, Pages 488-90', 'role': 'assistant'}]