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
Mouth Lesion are seen in: 
Select and explain. 
A. Psoriasis, B. Lichen Planus, C. Basal Cell CA, D. Icthyosis Vulgaris
B: Lichen Planus
Answer: B: Lichen Planus 
Explanation: B i.e. Lichen planus