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: Pathology
[{'content': "Darier's disease is associated with: \nSelect and explain. \nA. Pernicious anaemia, B. Rickets with involvement of teeth and bones, C. Vitamin A deficiency and involvement of oral epithelium and skin, D. Diffuse tender ulceration on the palate predominantly", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Darrier\'s disease shows benign dyskeratosis, which is characterized by typical dysplastic cells called "corps, rands and grains".', 'role': 'assistant'}]