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': 'A 56 year old male lallu presents with painful bullous lesion in lower extrimity, the most likely diagnosis is \nSelect and explain. \nA. Pemphigus Vulgaris, B. Bullous pemphigoid, C. Necrotic Pemphigus, D. Contact eczema', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Bullous pemphigoid', 'role': 'assistant'}]