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: ENT
In carcinoma of lower lip secondaries are seen in - 
Select and explain. 
A. Upper cervical LN, B. Supra clavicular LN, C. Axillary LN, D. Mediastinal LN
A: Upper cervical LN
Answer: A: Upper cervical LN 
Explanation: Submental and submandibular nodes are involved first in carcinoma of lips.
Submental and submandibular are included in upper cervical LN or level 1 lymph nodes.