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': 'In a patient of Class II div 1, which of the following features is present? \nSelect and explain. \nA. ANB of +2°, B. ANB of +8°, C. ANB of -9°, D. FMA >35°', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Skeletal class I: An orthognathic face with the following important features:\n\nStraight profile\nNormal ANB angle: 2° ± 2\nNormal facial angle (downs): 82–95° (mean 87.3°)\nAngle of convexity (downs): +10 to −8.5° (mean 0°).\n\nSkeletal class II: A retrognathic face that may be due to a prognathic maxilla or retrognathic mandible. Important features are:\n\nConvex profile\nIncreased ANB angle\nReduced facial angle\nIncreased angle of convexity\nSevere backward\xa0rotation of the mandible may also be present.\n\nSkeletal class III: A prognathic face at chin that may be due to a prognathic mandible or retrognathic maxilla. Possible significant features are:\n\nConcave profile\nProminent chin\nDecreased ANB angle\nIncreased facial angle\nReduced angle of convexity.\n\nReference: Orthodontics: Diagnosis and Management of Malocclusion and Dentofacial Deformities 3rd O P Kharbanda, pdf no 337', 'role': 'assistant'}]