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: Medicine
[{'content': 'Haemoptysis is caused by the following \nSelect and explain. \nA. Leukaemia, B. Haemophilia, C. Anticoagulant therapy, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]