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: Pathology
The process by which red blood cells move out of vessels through widened inter endothelial junction is referred to as: 
Select and explain. 
A. Pavementing, B. Diapedesis, C. Rouleax formation, D. Chemotaxis migration
B: Diapedesis
Answer: B: Diapedesis 
Explanation: None