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: Skin
Crocodile skin or sauroderma is seen in : 
Select and explain. 
A. Toxic epidermal necrolysis, B. Psoriasis, C. Darier's disease, D. Ichthyosis vulgaris
D: Ichthyosis vulgaris
Answer: D: Ichthyosis vulgaris 
Explanation: D i.e. Ichthyosis vulgaris