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
[{'content': "Ludwig's Angina spreads by \nSelect and explain. \nA. Lymphatics, B. Vascular route, C. Contiguity via fascial planes, D. Both Lymphatics and blood vessels", 'role': 'user'}, {'content': "Answer: C \nExplanation: Spread of Ludwig's Angina is via fascial planes in continuity and not by Lymphatics.", 'role': 'assistant'}]