This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Injuries, Subject name: Forensic Medicine
[{'content': 'True about Rigor mortis: \nSelect and explain. \nA. Does not occur in fetus less than 7 months, B. Involves voluntary muscles only, C. Lasts for 12 - 24 hours in summer, D. Starts in chin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (A). Does not occur in fetus less than 7 monthsRigor mortis involves both voluntary and involuntary muscles, earlier in involuntary muscles.Rigor mortis is not seen inRigor mortis is tested byFetus < 7 monthsQHeat stiffeningQEmbalmingQTrying to lift eyelidsLowering the jawBending neck & thighsInstrument:Electromyogram', 'role': 'assistant'}]