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
Darier's disease is associated with: 
Select and explain. 
A. 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
C: Vitamin A deficiency and involvement of oral epithelium and skin
Answer: C: Vitamin A deficiency and involvement of oral epithelium and skin 
Explanation: Darrier's disease shows benign dyskeratosis, which is characterized by typical dysplastic cells called "corps, rands and grains".