This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ocular trauma , Subject name: Ophthalmology
[{'content': 'The golden period of eye donation is \nSelect and explain. \nA. 6 hours, B. 12 hours, C. 18 hours, D. 24 hours', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (Refer: AK Khurana Comprehensive Ophthalmology, 6th edition, pg no. 136)"Donor corneas are harvested from cadaveric donors within 6 hours after death, sometimes up to 12 hours after death in countries with cold climates".', 'role': 'assistant'}]