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
Bullet entry wound, for bullet entering at acute angle is identified by what shape of abrasion collar - 
Select and explain. 
A. Circular, B. Rectangular, C. Oval, D. None of the above
C: Oval
Answer: C: Oval 
Explanation: The synopsis of forensic medicine & toxicology ; Dr k.s narayan reddy ; 28th edition ;pg.no 132 ; If bullet strikes at right angle abrasion collar is circular & uniform ,if acute angle the abrasion collar will be oval due to increased width on one one side .