This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and paranasal sinuses, Subject name: ENT
[{'content': 'Antrum of Highmore is? \nSelect and explain. \nA. Maxillary, B. Ethmoid, C. Sphenoid, D. Frontal', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The antrum of Highmore is maxillary sinus. It is the largest of paranasal sinuses and occupies the body of the maxilla. (Reference: Textbook of PL Dhingra and Shruti Dhingra; 7th edition, pg no. 209)', 'role': 'assistant'}]