This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autoimmune skin disorders, Subject name: Dental
[{'content': 'Erythema nodosum is seen in all except - \nSelect and explain. \nA. SLE, B. TB, C. Pregnancy, D. Sulfonamide use', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Causes of erythema nodosum are Bacterial: streptococcus, TB, yersinia Fungi: coccidiodomycosis Viruses: IMN, HBV Others: amoebiasis, giardiasis, chlamydia Drugs: sulfonamides, bromides , OCP Miscellaneous: sarcoidosis, Behcets disease, UC, connective tissue disorders, malignancy, pregnancy From illustrated synopsis of dermatology and sexually transmitted diseases neena khanna 5th edition page no 201', 'role': 'assistant'}]