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
[{'content': 'Brown color of contusion is due to: \nSelect and explain. \nA. Biliverdin, B. Reduced hemoglobin, C. Hemosiderin, D. Bilirubin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Color Pigment Time Duration Red Oxy hemoglobin Fresh Blue Deoxy hemoglobin Few hours - 3 days Brown Hemosiderin 4 -5 days Green Biliverdin/ hematoidin 6 -7 days Yellow Bilirubin 7 - 14 days', 'role': 'assistant'}]