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: Anatomy
The frontal paranasal sinus drains into the: 
Select and explain. 
A. Superior meatus, B. Middle meatus, C. Inferior meatus, D. Spheno-ethmoidal recess
B: Middle meatus
Answer: B: Middle meatus 
Explanation: None