This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mycobacterial Infections, Subject name: Dental
[{'content': 'Erythema induratum can be a manifestation of: \nSelect and explain. \nA. Lepra reaction, B. Tuberculosis, C. Dermatitis, D. Psoriasis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Erythema induratum of Bazin/ Nodular tuberculid /Bazin disease - Erythematous nodules develop over posterior leg, usually ulcerates - Lobular panniculitis Erythema nodosum/ Facultative tuberculid -develop over anterior leg, which does not ulcerate ( differentiating point with Erythema induratum)', 'role': 'assistant'}]