This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autacoids, Subject name: Pharmacology
[{'content': 'Which of the following drugs cause oligospermia \nSelect and explain. \nA. Leflunomide, B. D-pencillamine, C. Methotrexate, D. Sulfasalazine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Sulfasalazine can cause a reversible infeility in males open to changes in sperm number and morphology Refer Goodman and Gilman 12/e p1466', 'role': 'assistant'}]