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: Social & Preventive Medicine
[{'content': 'Service applied, staff recruitement, staff trained, Equipment ordered, equipment installed, product delivered which is the critical step \nSelect and explain. \nA. Staff recruitment, B. Staff trained, C. Equipment ordered, D. Equipment installed', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Equipment installed", 'role': 'assistant'}]