This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lichen planus and Other papulosquamous disorders, Subject name: Dental
Lichen simplex chronicus, not true is 
Select and explain. 
A. Presents with demarcated lichenified skin plaque, B. Commonly affects the trunk and groin, C. Represents end stage of eczematous skin diseases, D. Glucocoicoids are mainstay of treatment
B: Commonly affects the trunk and groin
Answer: B: Commonly affects the trunk and groin 
Explanation: Lichen simplex chronicus Represents end stage of variety of pruritic and eczematous disorders, including Atopic Dermatitis. It consists of a circumscribed/ demarcated plaque of lichenified skin due to chronic scratching or rubbing. Common areas involved include the posterior nuchal region, dorsum of feet and ankles. Treatment :centers on breaking the cycle of chronic itching and scratching. High-potency topical glucocoicoids , But in recalcitrant cases, application of topical glucocoicoids under occlusion, or intralesional injection of glucocoicoids is required.