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
Feature which differentiates true from aificial bruise is - 
Select and explain. 
A. Round shape with irregular margins, B. Irregular shape with regular margins, C. Swelling of surrounding area, D. Erythema of surrounding area
A: Round shape with irregular margins
Answer: A: Round shape with irregular margins 
Explanation: The synopsis of forensic medicine & toxicology ; Dr k.s.narayan ; 28 th edition Pg .no. 110 Table 8-3 Shape of true bruise is usually round while that of aificial bruise is irregular .Erythema & swelling seen in the surrounding area in case of aificial bruise not in true bruise .In true bruise erythema and swelling is seen in the site .