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': 'The best drug for control of esophageal bleeding is? \nSelect and explain. \nA. Vasopressin, B. Octreotide, C. GnRH, D. Propranolol', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Vasopressin Terlipressin (analogue of vesopressin) is considered the vasoactive agent of choice for acute variceal bleeding. Other drugs used are somatostatin and its analog octeride.", 'role': 'assistant'}]