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': 'Use of morphine should be avoided in all of the following patients EXCEPT ? \nSelect and explain. \nA. Ischemic heart disease patients, B. Bronchial asthma patients, C. Elderly male patients, D. Biliary colic patients', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]