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
Itchy polygonal violaceous palpules seen in – 
Select and explain. 
A. Psoriasis, B. Pemphigus, C. Lichen planus, D. Pitriasios rosea
C: Lichen planus
Answer: C: Lichen planus 
Explanation: The characteristic lesion of lichen planus is pruritic (Itchy), Polygonal, purple (violaceous), Plane (flat topped) papule or plaque.