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: Anatomy
[{'content': 'Submental lymph node drainage by all except - \nSelect and explain. \nA. Anterior palate, B. Tip of tongue, C. Floor of mouth, D. Lower lip', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Submental lymph nodes drain superficial tissues below the chin, central part of lower lip, adjoining gums, anterior part of floor of mouth and tip of tongue.', 'role': 'assistant'}]