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': 'Bruise attains greenish discoloration by: September 2003 \nSelect and explain. \nA. 1 day, B. 2-3 days, C. 5-6 days, D. 7-12 days', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C i.e. 5-6 days', 'role': 'assistant'}]