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': 'Morphine a powerful opioid analgesic drug should be avoided in all the following conditions except: \nSelect and explain. \nA. Left ventricular failure, B. Bronchial asthma, C. Constipation, D. Pancreatitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]