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': "Drug which produces Steven Johnson's syndrome in HIV infected individuals is : \nSelect and explain. \nA. Paraaminosalicylate, B. Cycloserine, C. Thioacetazone, D. Rifampicin", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]