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
All of the following are causes of cicatrizing alopecia except - 
Select and explain. 
A. Lichen planus, B. Discoid lupus erythematosus, C. Alopecia areata, D. Lupus vulgaris
C: Alopecia areata
Answer: C: Alopecia areata 
Explanation: Causes of cicatricial alopecia: -Discoid lupus erythematosus and morphea - developmental /hereditary : aplasia cutis -traumatic, post radiation -herpes sister,inflammatory tinea capitisand bacterial infections -lichen planopilaris - folliculitis decalvans and dissecting cellulitis of the scalp -pseudopelade of Brocq - neoplastic disorders Ref Harrison20th edition pg 1234