<prompt> Which of the following is an agent used for deep chemical peels?Carbolic acidGlycolic acidMandelic acidSalicylic acid  <response>: Carbolic acid phenol is used for deep peels is a component of Baker - Gordon formula. All others are hydroxy acids used for superficial medium depth peels. Ref: Textbook of dermatosurgery cosmetology, Satish S savant, E-2, P-177. 