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: Orthopaedics
patient recieved 12 hours after fracture of tibia is having pO2 as 60% On re breathing unit maintaining the saturation of loo% but remains confused Chest is clear What is most likely diagnosis 
Select and explain. 
A. Pulmonary confusion, B. Fat embolism syndrome, C. Pulmonary Embolism, D. ARDS
B: Fat embolism syndrome
Answer: B: Fat embolism syndrome 
Explanation: REF : MAHESWARI 7TH ED