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': 'Acantholysis is seen in – \nSelect and explain. \nA. Epidermis, B. Dermis, C. Dermo–epiderm junction, D. Subcutaneous tissue', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Abnormal separation of epidermal keratinocytes is referred to as acantholysis.', 'role': 'assistant'}]