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
Cherry red colour of blood is seen in poisoning with- 
Select and explain. 
A. Nitrate, B. Cyanide, C. Lead, D. Sulphite
B: Cyanide
Answer: B: Cyanide 
Explanation: None