This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C. Mycobacteria, Subject name: Skin
[{'content': 'Lucio reaction is seen in - \nSelect and explain. \nA. TB, B. Leprosy, C. Syphillis, D. LGV', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans is 'b' i.e., Leprosy Lucio reaction/phenomenono Seen in untreated cases of lepromatous leprosy (LL).o Patients develop recurrent crops of large, sharply marginated, ulcerative lesions, particularly on lower extremities,o It is due to heavy parasitism of endothelial cells, endothelial proliferation and thrombus formation which leads to ischemic necrosis.", 'role': 'assistant'}]