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 colour of the bruise is due to - 
Select and explain. 
A. Hemosiderin, B. Deoxyhemoglobin, C. Bilirubin, D. Hematoidin
B: Deoxyhemoglobin
Answer: B: Deoxyhemoglobin 
Explanation: Blue color of bruise is due to deoxyhemoglobin (reduced hemoglobin).