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
In a firearm injury, blackening seen around the entry wound is due to: DNB 09 
Select and explain. 
A. Flame, B. Smoke, C. Unburnt powder, D. Hot gases
B: Smoke
Answer: B: Smoke 
Explanation: Ans. Smoke