This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
[{'content': 'Camouflage treatment is best avoided in \nSelect and explain. \nA. Mild to moderate skeletal Class II malocclusions, B. Severe skeletal class III malocclusions, C. Good vertical proportions of the face, D. Patients in the age of growth modulation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]