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
Ramesh singh, a 40 yrs old man, was admitted with fracture shaft femur following a road traffic accident. Three days after tauma he was tachypnoeic, and had conjunctival petechiae. Most likely diagnosis is ? 
Select and explain. 
A. Pulomary embolism, B. Sepsis syndrome, C. Fat embolism, D. Hemothorax
C: Fat embolism
Answer: C: Fat embolism 
Explanation: Ans. is 'c' i.e., Fat embolism This patient in question has femur fracture has developed classical triad of fat embolism :- Respiratory symptom :- Tachypnea Neurological symptom :- Disorientation Petechial rash :- Conjunctivalpetechiae So, the most probable diagnosis is fat embolism syndrome.