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: Physiology
Pulmonary endothelium is NOT concerned with which of the following: 
Select and explain. 
A. Lipoprotein lipase, B. Plasminogen activator, C. Thrombin, D. Factor X
D: Factor X
Answer: D: Factor X 
Explanation: None