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
Wickmann's straie seen in ? 
Select and explain. 
A. Lichen planus, B. Psoriasis, C. Dermatomyositis, D. Was
A: Lichen planus
Answer: A: Lichen planus 
Explanation: Ans. is 'a' i.e., Lichen planus