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
Lymph vessel which drain the posterior 1/3 rd of the tongue: 
Select and explain. 
A. Basal vessel., B. Marginal vessel., C. Central vessel., D. Lateral vessel.
A: Basal vessel.
Answer: A: Basal vessel. 
Explanation: None