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': 'P.E.R.T. is a type of- \nSelect and explain. \nA. Input output analysis, B. System analysis, C. Network analysis, D. Work sampling', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Network analysis", 'role': 'assistant'}]