This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oral Cavity, Subject name: ENT
In carcinoma of lower lip secondaries are seen in: 
Select and explain. 
A. Submandibular LN, B. Preauricular LN, C. Mediastinal LN, D. Supraclavicular LN
A: Submandibular LN
Answer: A: Submandibular LN 
Explanation: (a) submandibular LN(Ref. Cummings, 6th ed., 1364)Nodal spread from carcinoma lower lip involves submental and submandibular lymph nodes (level 1).