This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mechanical injuries, Subject name: Forensic Medicine
Which vehicular injury is not caused by direct contact of vehicle - 
Select and explain. 
A. Primary impact, B. Secondary impact, C. Secondary injury, D. Rolling over
C: Secondary injury
Answer: C: Secondary injury 
Explanation: the synopsis of forensic medicine & toxicology; Dr k.s narayan reddy; 28th edition ;pg.no. 149 Direct contact of the vehicle produces primary impact injury ,secondary impact injury is also caused by the impact of the vehicle but the secondary injury is caused by the victim's striking object ,such as the ground.