This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Medicine
[{'content': 'Which of the following conditions can produce hemothorax? \nSelect and explain. \nA. Myxoma, B. Congestive hea failure, C. Rheumatoid ahritis, D. malignancy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Hemothorax commonly seen in iatrogenic(traumatic),malignancy,pulmonary embolism. Hemothoraces are usually caused by an injury but may occur spontaneously: due to cancer invading the pleural cavity, as a result of a blood clotting disorder, as an unusual manifestation of endometriosis, in response to a collapsed lung, or rarely in association with other conditions . Ref Davidson edition23rd pg 630', 'role': 'assistant'}]