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 abnormal swallowing pattern with the poorest prognosis is: \nSelect and explain. \nA. Simple tongue thrust, B. Complex tongue thrust, C. Infantile swallow, D. Retained infantile swallow', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]