This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
Thrombosis is initiated by 
Select and explain. 
A. platelet activation, B. endothelial damage, C. Coagulation cascade, D. vasoconstriction of vessels
B: endothelial damage
Answer: B: endothelial damage 
Explanation: ref : robbins 10th ed