This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Papulosquamous disorders, Subject name: Dental
Wickhams stria seen in- 
Select and explain. 
A. lichen niditus, B. Lichenoid eruption, C. Lichen striates, D. Lichen Planus
D: Lichen Planus
Answer: D: Lichen Planus 
Explanation: LICHEN PLANUS:- Inflammatory T cell mediated auto immune disorder affecting skin, hair,nails and mucous membranes.Four Ps- purple , polygonal and pruritic papule.Classic lesion- small polygonal shaped, and red/ violet, flat topped papule. Surface is slightly shiny/ transparent,and a network of fine,white lines called 'Wickhams striae' , small grey white puncta is also seen. IADVL textbook of dermatology PAGE 1070