This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of skin, Subject name: Dental
[{'content': 'Scarring alopecia is seen in - \nSelect and explain. \nA. T.Capitis, B. Androgenic alopecia, C. Alopecia areata, D. Lichen planus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Causes of cicatricial alopecia: -Discoid lupus erythematosus and morphea - developmental /hereditary : aplasia cutis -traumatic, post radiation -herpes zoster and bacterial infections -lichen planopilaris - neoplastic disorders Ref Harrison20th edition pg 1234', 'role': 'assistant'}]