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
A young male presented with dyspnea, bleeding and petechial hemorrhage in the chest after 2 days following fracture shaft of the femur right side. Most likely cause is - 
Select and explain. 
A. Air embolism, B. Fat embolism, C. Pulmonary thrombo-embolism, D. Amniotic fluid embolism
B: Fat embolism
Answer: B: Fat embolism 
Explanation: None