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': 'Which of the following is a secondary site of spread of odontogenic infection involving pterygomandibular space? \nSelect and explain. \nA. Infra temporal space, B. Canine space, C. Buccal space, D. Sublingual space', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]