This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Health education & planning, Subject name: Social & Preventive Medicine
[{'content': 'Time takan for any project is estimated by - \nSelect and explain. \nA. Work sampling, B. Input\\/output analmysis, C. Network analysis, D. System analysis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The essence of PE is to construct an Arrow Diagram. The diagram represents the logical sequence in which events must take place.It is possible with such a diagram to calculate the time by which each activity must be completed and to identify those activities that are critical (refer pgno:872 park 23 rd edition)', 'role': 'assistant'}]