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': 'Rigor mois first stas in : \nSelect and explain. \nA. Upper eyelids, B. Lower eyelids, C. Lower limbs, D. Fingers', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Upper eyelid', 'role': 'assistant'}]