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 50 years old man has a 2 year history of facial bullae & oral ulcers. Microscpic smear from skin lesions is most likely to disclose - \nSelect and explain. \nA. Tzanck cells, B. Acantholytic cells, C. Necrosis, D. Koilogytosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B. i.e. Acantholytic cell', 'role': 'assistant'}]