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': 'In rigor mois muscle : \nSelect and explain. \nA. Stiffens, B. Shoens, C. Stiffens and shoens, D. Stiffens and lengthens', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Stiffens & shoen In rigor mois, muscle shoen (contracted) & stiffensQ, and the reaction changes from alkaline to distinctly acidic d/t local formation of lactic acid.', 'role': 'assistant'}]