This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Papulosquamous disorders, Subject name: Dental
[{'content': 'The only definitive indication of systemic steroids in psoriasis- \nSelect and explain. \nA. Pustular psoriasis, B. Impetigo herpetiformis, C. Psoriatic ahropathy, D. Erythroderma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Only indication for use of systemic steroids is generalized pustular psoriasis in pregnancy ( impetigo herpetiformis). IADVL textbook of dermatology page 1049', 'role': 'assistant'}]