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': 'The pontic that should be used in the posterior mandibular area is: \nSelect and explain. \nA. Modified saddle., B. Saddle., C. Sanitary., D. Bullet shaped.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]