This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autoimmune skin disorders, Subject name: Dental
Granular layer is absent in 
Select and explain. 
A. Epidermolytic hyperkeratosis, B. Lamellar ichthyosis, C. Ichtyosis vulgaris, D. X linked ichtyosis
C: Ichtyosis vulgaris
Answer: C: Ichtyosis vulgaris 
Explanation: Granular layer is characteristically absent in ichthyosis vulgaris. iadvl textbook of dermatology page 700