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
Comedones are seen in- 
Select and explain. 
A. Acne vulgaris, B. Lichen Planus, C. Adenoma sebaceum, D. Pityriasis
A: Acne vulgaris
Answer: A: Acne vulgaris 
Explanation: Acne causes polymorphous cutaneous lesions such as comedones, papules, pustules, pseudocysts and abscesses which may leave scarring.comedones are the characteristic of acne vulgaris. Reference Harrison20th edition pg 1204