This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fungal infections, Scabies, Pediculosis, Subject name: Dental
Mucosa is involved in 
Select and explain. 
A. Psoriasis, B. Lichen planus, C. Alopecia, D. Porphyria
B: Lichen planus
Answer: B: Lichen planus 
Explanation: In lichen planus there are oral and genital lesions. There is nail and scalp involvement also. All the other given conditions do not produce mucosal involvement. Iadvl textbook of dermatology