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
All of the following may lead to plaque formation except – 
Select and explain. 
A. Psoriasis, B. Lichen planus, C. Pityriasis rosea, D. Pemphigus
D: Pemphigus
Answer: D: Pemphigus 
Explanation: Papulosquamous disorder results in papules or plaque.