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': 'Posterior palatal bar is placed \nSelect and explain. \nA. On the soft tissue, B. Placed on the hard palate entirely, C. At the junction of hard and soft palate, D. Should be kept 0.5-1 mm away from the mucosa', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The posterior bar of an anteroposterior palatal bar major connector is half oval in shape and located as far posteriorly as possible, at the junction of hard and soft palate.\nThe anterior bar of an anteroposterior palatal bar major connector is a flat strap and is located as far posteriorly as possible to avoid rugae coverage and tongue interference.', 'role': 'assistant'}]