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': 'A 13 year old female patient, complains of bleeding from gums while brushing and has a history of deviated nasal septum. Extraoral examination reveals increased anterior facial height. Intraoral findings reveals erythematous gingiva and spontaneous bleeding on probing. These features are seen in patients with \nSelect and explain. \nA. Thumb sucking, B. Tongue thrusting, C. Mouth breathing, D. Bruxism', 'role': 'user'}, {'content': 'Answer: C \nExplanation: A wide variety of local irritants can produce a hyperplastic\xa0type\xa0of\xa0gingivitis\xa0in\xa0children\xa0and\xa0young\xa0adults. The irritation to the gingival tissue produced by mouth breathing is often responsible for the development of the\xa0chronic\xa0hyperplastic\xa0form\xa0of\xa0gingivitis,\xa0 particularly\xa0in the maxillary arch. All these factors should be considered\xa0contributory to chronic nonspecific gingivitis and should be\xa0 corrected\xa0in\xa0the\xa0treatment\xa0of\xa0the\xa0condition.\xa0 The importance\xa0of\xa0thorough\xa0daily\xa0oral\xa0hygiene\xa0must\xa0be emphasized repeatedly to the patients.', 'role': 'assistant'}]