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
[{'content': 'For transplantation, cornea can be removed from dead body upto \nSelect and explain. \nA. 6 hours, B. 12 hours, C. 18 hours, D. 24 hours', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Time of molecular death in different tissues varies with each tissue.\nMaximum time of removal of organs for transplantation -\n\nBrain 5-7 minutes\nLiver 15 minutes\nKidney 45 minutes\nHeart 60 minutes\nCornea 6 hours\nBone 48 hours\nVessels 72 hours', 'role': 'assistant'}]