Comedones are seen in-: (A) Acne vulgaris, (B) Lichen Planus, (C) Adenoma sebaceum, (D) Pityriasis
Answer is A. 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