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
Which of the following conditions can produce hemothorax? 
Select and explain. 
A. Myxoma, B. Congestive hea failure, C. Rheumatoid ahritis, D. malignancy
D: malignancy
Answer: D: malignancy 
Explanation: 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