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
Blue color of contusion is due to: Gujarat 07 
Select and explain. 
A. Bilirubin, B. Hemosiderin, C. Hematoidin, D. Deoxyhemoglobin
D: Deoxyhemoglobin
Answer: D: Deoxyhemoglobin 
Explanation: Ans. Deoxyhemoglobin