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
In a case of hanging, ligature mark is an example of: 
Select and explain. 
A. Contusion, B. Pressure abrasion, C. Laceration, D. Burn
B: Pressure abrasion
Answer: B: Pressure abrasion 
Explanation: LIGATURE MARK IN CASE OF HANGING IS AN EXAMPLE OF PRESSURE ABRASION Pressure abrasions are caused by crushing of the superficial layers of the epidermis Causative forces : Pressure abrasion: Ligature mark in hanging & strangulation Scratch abrasion: Fingernails, pin, thorn, tip of a knife Graze abrasion: Road traffic accidents Patterned abrasion: Tyre marks, Ligature mark.