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
An embolus which passes through an arteriovenous communication and enters the systemic circulation is called? 
Select and explain. 
A. Paradoxical embolus, B. Retrograde embolus, C. Saddle embolus, D. Atheroembolus
A: Paradoxical embolus
Answer: A: Paradoxical embolus 
Explanation: Rarely, an embolus passes through an atrial or ventricular defect and enters the systemic circulation called paradoxical embolism.
Pulmonary Embolus can occlude the main pulmonary artery, lodge at the bifurcation of the right and left pulmonary arteries called saddle embolus.
Robin’s Textbook of pathology 10th ed Page 112