This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Forensic Medicine
Post moem staining before death can occur in 
Select and explain. 
A. Cholera, B. Old age, C. Children, D. Hanging
A: Cholera
Answer: A: Cholera 
Explanation: Postmoem hypostasis is seen before death in cases of cholera, uremia, plague, morphine, etc Ref: researchgate.net