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: Dental
Maxillary antrum dips in the region of? 
Select and explain. 
A. Between 2nd premolar and 1 molar, B. Between buccal roots of furcation of 1st molar, C. Between 1 & 2 premolar, D. Between 1 & 2 molars
A: Between 2nd premolar and 1 molar
Answer: A: Between 2nd premolar and 1 molar 
Explanation: None