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: Skin
[{'content': 'Which of the following is true about erythema multiforme: September 2011 \nSelect and explain. \nA. Triggered mainly by HIV infection, B. Target lesions are seen, C. Full blown prodromal symptoms, D. Involvement of mucosa more common', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Target lesions are seen Typical lesion of erythema multiforme is a target lesion, which consists of 3 concentric components 1) central dusky erythema, sometimes surmounted with a vesicle/ bulla, 2) pale edematous ring and 3) erythematous halo "Erythema" in dermatology: Erythema induratum: Bazins disease Erythema nodosum: Multisystemic disorders e.g. sarcoidosis Erythema chronicum migrans: Lymes disease', 'role': 'assistant'}]