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: Surgery
The commonest site of lodgement of a pulmonary embolus is in the territory of - 
Select and explain. 
A. Rt. lower lobe, B. Rt. upper lobe, C. Lt. lower lobe, D. Lt. upper lobe
D: Lt. upper lobe
Answer: D: Lt. upper lobe 
Explanation: Ans. is 'd' i.e., Lt. upper lobe