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
IVC filter is used in following except - 
Select and explain. 
A. Massive emboli, B. Negligible size of emboli, C. Repeated emboli, D. None
B: Negligible size of emboli
Answer: B: Negligible size of emboli 
Explanation: None