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': 'In Pemphigus vulgaris, tzank smear shows – \nSelect and explain. \nA. Acantholytic cells, B. Macrophages, C. Fibroblasts, D. Neutrophils', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]