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
Metastasis of carcinoma 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: The spread of carcinoma of buccal mucosa 

Buccal carcinoma spread locally and to regional lymph nodes.

1) Local spread: - From its site of origin, the lesion may spread deeply involving submucosa → muscle → Subcutaneous fat → skin. Involvement of buccinator muscle or anterior masseter causes trismus.
2) Lymphatic spread: - Nodal involvement occurs in about 50% of cases. Submandibular and later the upper jugular nodes may get involved. Upper jugular nodes may also be involved, directly skipping the submandibular group.