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
Partial or complete obstruction of some part of the C.V.S by a foreign body transported by the blood stream is termed as: 
Select and explain. 
A. Thrombosis, B. Coagulation, C. Ischaemia, D. Embolism
D: Embolism
Answer: D: Embolism 
Explanation: None