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
[{'content': 'Maximum cumulative dose of isotretinoin should not exceed \nSelect and explain. \nA. 60 mg/kg, B. 90 mg/kg, C. 90-120 mg/kg, D. 120-150 mg/kg', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Isotretinoin - Isomer of 13 cis retinoic acid Dose: 0.5-1 mg/kg/bwt Maximum cumulative dose: Should not exceed the maximum cumulative dose.', 'role': 'assistant'}]