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
Length of stab gives information about - 
Select and explain. 
A. Length of blade, B. Width of blade, C. Angle of inseion, D. Thickness of the blade
B: Width of blade
Answer: B: Width of blade 
Explanation: The synopsis of forensic medicine & toxicology ; Dr k.s narayan reddy ; 28th edition ; Pg.no. 114 : The length of the wound is slightly less than the width of the weapon upto which it has been driven in ,because of the stretching of the skin . Therefore length of stab wound gives information of the width of the weapon .