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: Forensic Medicine
A 25 years female was found in the room with 100% burns on her body. The tongue was protruding out; the body was in pugilistic attitude with heat ruptures, peeling of skin, and heat haematoma and heat fractures of the skull. Carboxyhemoglobin was 25% and soot particles were present in the trachea. Which of the combinations of two findings will establish that the burns were antemortem in nature- 
Select and explain. 
A. Heat haematoma & heat ruptures, B. Heat fracture of skull and peeling of skin, C. Heat haematoma and pugilistic attitude, D. Carboxy hemoglobin (25%) and soot particles in trachea
D: Carboxy hemoglobin (25%) and soot particles in trachea
Answer: D: Carboxy hemoglobin (25%) and soot particles in trachea 
Explanation: Presence of carbon particles (soot) in respiratory passages and elevated level of carboxy-hemoglobin confirms that victim was alive when the burn occurred.
i.e. Ante-mortem burn.