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
"Interface dermatitis" is a histological feature of 
Select and explain. 
A. Psoriasis, B. Lichen planus, C. Pityriasis rosea, D. Dermatophytosis
B: Lichen planus
Answer: B: Lichen planus 
Explanation: Interface dermatitis includes diseases in which the primary pathology involves the dermo-epidermal junction. (hence called interface). The salient histological findings include basal cell vacuolization, apoptotic keratinocytes (colloid or Civatte bodies), and obscuring of the dermo-epidermal junction by inflammatory cells. Lupus erythematosus, dermatomyositis, lichen planus, graft versus host disease, erythema multiforme, fixed drug eruptions are some examples. Ref Harrison 20th edition pg 1234