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: Dental
[{'content': 'Woronoff ring is \nSelect and explain. \nA. Ring of lesions seen over axilla,groin when hands are rested on trunk, B. Annular hypopigmented ring around lesions of psoriasis, C. Ring shaped pruritic lesions over dorsum of foot, D. Annular shaped erythematous rash around eyes in allergic dermatitis.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]