This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
Submental lymph node drainage by all except 
Select and explain. 
A. Anterior palate, B. Tip of tongue, C. Floor of mouth, D. Lower lip
C: Floor of mouth
Answer: C: Floor of mouth 
Explanation: There are two to four submental lymph nodes situated in superficial facia between anterior bellies of digastric muscle.they drain to Superficial tissues below the chin Central pa of lower lip The adjoing gums Anterior pa of floor of mouth Tip of the tongue. Ref: BDC, vol 3, page no: 96