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: Orthopaedics
A 40 year old male with history of RTA with multiple long bones fracture, develops tachypnoea, periumbilical rashes and has urinary fat globules, the most likely diagnosis is 
Select and explain. 
A. Proximal urethral injury, B. Bladder injury, C. Bacterial pneumonitis, D. Fat embolism syndrome
D: Fat embolism syndrome
Answer: D: Fat embolism syndrome 
Explanation: None