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: Surgery
Metastasis of ca buccal mucosa goes to - 
Select and explain. 
A. Regional lymph node, B. Liver, C. Heart, D. Brain
A: Regional lymph node
Answer: A: Regional lymph node 
Explanation: "Tumors in this area have a propensity to spread locally and to metastasize to regional lymphatics."- Schwartz
Also know

Lymphatic metastasis of Buccal ca go to submandibular and later upper jugular nodes. - Dhingra 4/e
MC type of Buccal ca → Squamous cell ca
Commonest site of origin → angle of mouth or the line of occlusion of upper and lower teeth (Dhingra)