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: Pathology
[{'content': 'Commonly involved Lymph nodes during metastasis from carcinomas of oral cavity is \nSelect and explain. \nA. jugulo omohyoid and jugulo digastric, B. Sub mandibular and cervical lymph nodes, C. Submental and submandibular lymphnodes, D. none of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]