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
What is the colour of postmortem lividity in case of cyanide poisoning? 
Select and explain. 
A. Pink, B. Chocolate brown, C. Bluish green, D. Brick red
D: Brick red
Answer: D: Brick red 
Explanation: Cyanide poisoning - Brick red
Carbon monoxide poisoning - cherry red