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': 'All are the effects of thumb sucking except: \nSelect and explain. \nA. SNA angle increases., B. ANB angle increases., C. SN to ANS- PNS angle is increased., D. Anterior open bite.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: There is no change in SN to ANS-PNS angle in thumb sucking,\nEffects of thumb sucking:\n\nProclination of maxillary anteriors. SNA angle is increased.\nIf there is lingual tipping of mandibular incisors, ANB angle is increased\nAnterior open bite\nNarrow and long maxillary arch\nHypotonic upper lip', 'role': 'assistant'}]