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
[{'content': 'Which of the following shows Kevorkian sign? \nSelect and explain. \nA. Retina, B. Sclera, C. Choroid, D. Vitreous', 'role': 'user'}, {'content': "Answer: A \nExplanation: Kevorkian sign is fragmentation of blood column in retinal vessels which occurs few minutes after death and lasts for an hour. It is visualised by ophthalmoscope. Ref: K.S.Narayan Reddy's Synopsis of Forensic Medicine and Toxicology, 29th edition, Chapter 7, page-83.", 'role': 'assistant'}]