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': 'Mechanism of action of aboion stick used in criminal aboion:AIIMS 06; AI 08 \nSelect and explain. \nA. Necrosis of endometrium causing infection, B. Uterine contraction, C. Stimulation of uterine nerves, D. Inducing uterine relaxation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Uterine contraction', 'role': 'assistant'}]