This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Death and postmortem changes, Subject name: Forensic Medicine
All are true about postmoem staining except - 
Select and explain. 
A. Occur immediate after death, B. Common in dependent pa, C. Disappear with rigor mois, D. Margins are raised
A: Occur immediate after death
Answer: A: Occur immediate after death 
Explanation: Postmoem staining occurs sholy after death and becomes prominent after four hours. Dr.Narayana Reddys Synopsis of Forensic Medicine and Toxicology 27th edition pg. 76.