All trans retinoic acid is used topically for -: (A) Acne vulgaris, (B) Lupus vulgaris, (C) Alopecia areata, (D) Androgenic alopecia
Answer is A. Ans. is 'a' i.e., Acne vulgaris * All-trans retinoic acid (Tretinoin) is used topically, while 13-cis retinoic acid (Isotretinoin) is given orally for acne.