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
Lightening flash can cause injury by all of the following, except- 
Select and explain. 
A. Direct effect of electric currrent, B. Super heated air, C. Expanded and repelled air, D. Compressed air pushed in front of the current
D: Compressed air pushed in front of the current
Answer: D: Compressed air pushed in front of the current 
Explanation: Mechanism of injury in lightening burns are:-

Direct effect of high voltage current.
Heat, i.e. superheated air causing burns.
Expanded and displaced air, which acts as a blast wave.
Sledgehammer blow by compressed air pushed before the current (sledgehammer effect and blow death).