This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Identification, Subject name: Forensic Medicine
[{'content': 'All are useful in knowing the time since death Except \nSelect and explain. \nA. Cooling of the body, B. Rigor mois, C. Postmoem staining, D. Postmoem bruising', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Sequential changes after death like the degree of rigor mois, postmoem hypostasis, postmoem cooling and extent of putrefactive changes are assessed. They will help a great deal in asceaining the time since death. Ref - Krishan Vij 5th edition', 'role': 'assistant'}]