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
Granular layer is absent in – 
Select and explain. 
A. Ichthyosis vulgaris, B. X linked ischyosis, C. Epidermolytic hyperkeratosis, D. Lamellar ichthyosis
A: Ichthyosis vulgaris
Answer: A: Ichthyosis vulgaris 
Explanation: In Ichthyosis vulgaris there is deficiency of filaggrin a protein found in granular layer. This results in absence of granular layer.