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': 'Immediate stiffness postmortem occurs in - \nSelect and explain. \nA. Cadaveric rigidity, B. Cadaveric spasm, C. Rigor mortis, D. Algor mortis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Immediate stiffness after death occurs in cadaveric spasm.', 'role': 'assistant'}]