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
Primary injury is ? 
Select and explain. 
A. Due to flying debris b, B. Due to blast wind, C. Due to shock wave, D. Due to complication
C: Due to shock wave
Answer: C: Due to shock wave 
Explanation: Ans. is 'c' i.e., Due to shock wave Types of blast injuries These are of following types :? Primary : It is due to shock wave which causes injury to hollow organs. e.g. ears, lungs, eyes, GIT etc. Secondary : These are due to flying debris (missiles). Classical Marshalls triad i.e. bruises, abrasions and puncture laceration is diagnostic of explosive injury. Teiary : It is due to blast wind, i.e. victm is thrown into air and strikes other objects leading to fracture, blunt trauma etc. Quaternary : Any complicating factor (not in first three categories) causes quaternary injury, e.g. anoxia, respiratory problems etc