This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oral Cavity & Tongue, Subject name: Anatomy
[{'content': 'Submental lymph nodes drains from - \nSelect and explain. \nA. Centre of lower lips, B. Posterior 1 /3 of tongue, C. Anterior 2/3 of tongue, D. Angle of mouth', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Centre of lower lips Submental lymph nodeso These lymph nodes lie on the mylohyoid in the submental triangle. The receive afferents from superficial tissue below chin, central part of lower lip, adjoining gums, anterior part of the floor of the mouth and tip of the tongue. These nodes, themselves, drain into (efferent) into submandibular nodes.", 'role': 'assistant'}]