This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Dental
[{'content': "Dyskeratosis is a feature of \nSelect and explain. \nA. Darier's disease, B. Pemphigus vulgaris, C. Psoriasis, D. Lichen planus", 'role': 'user'}, {'content': "Answer: A \nExplanation: Faulty and premature keratinization of individual keratinocytes is called dyskeratosis. Dyskeratotic cells are usually intensely eosinophilic and may contain a small, dense, basophilic nuclear remnant. Dyskeratotic cells may also be densely basophilic as seen in Darier's disease.", 'role': 'assistant'}]