This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Forensic Medicine
[{'content': 'Feature which differentiates true from aificial bruise is ? \nSelect and explain. \nA. Round shape with irregular margins, B. Irregular shape with regular margins, C. Swelling of surrounding area, D. Erythema of surrounding area', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Round shape with irregular margins", 'role': 'assistant'}]