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
The commonest site of aspiration of a foreign body in the supine position is into the: 
Select and explain. 
A. Right upper lobe apical, B. Right lower lobe apical, C. Left basal, D. Right medial
B: Right lower lobe apical
Answer: B: Right lower lobe apical 
Explanation: In supine position and with the patient on back superior segment of RLL is the most dependent segment.