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
[{'content': 'Antrum of Highmore is another name for: \nSelect and explain. \nA. Maxillary, B. Ethmoid, C. Sphenoid, D. Frontal', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Maxillary sinus is also called as antrum of highmore and is the first to develop in human fetus.It is the largest paranasal sinus (15 ml capacity in adults).', 'role': 'assistant'}]