This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acne and chemical peeling, Subject name: Dental
An 18-year-old woman had severe acne for 3 years. She has tried many topical therapies for acne scars, but noticed little benefit. On examination, she has multiple scars associated with pitting on her face. Which of the following can not be used for chemical peeling ? 
Select and explain. 
A. Glycolic acid, B. Lactic acid, C. Trichloroacetic acid, D. Sulphuric acid
D: Sulphuric acid
Answer: D: Sulphuric acid 
Explanation: Chemical peels are used for acne scars. Agents used are Pyruvic acid Glycolic acid Malic acid Citric acid Lactic acid Taaric acid Salicylic acid Trichloroacetic acid Mandelic acid Jessners soluion - Combination of Salicylic acid+ lactic acid+ resorcinol