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': 'Least desirable maxillary major connector is: \nSelect and explain. \nA. Complete palate, B. Double palatal bar, C. Horse-shoe shaped, D. Closed horse-shoe', 'role': 'user'}, {'content': "Answer: C \nExplanation: U' shaped (or) Horse shoe shaped major connector:\n\nLeast desirable palatal major connector.\nPoorest designed palatal major connector, because it lacks rigidity.\nThis is indicated only in cases of inoperable tori, extending to the posterior limit of the hard palate.\nIt lacks rigidity.\nThis design leads to increased ﬂexibility and movement at the open ends.\nThe wider the coverage, the more it resemble a complete palate (palatal plate).", 'role': 'assistant'}]