This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Allied Health Sciences, Subject name: Social & Preventive Medicine
[{'content': "'Critical path' in Network analysis is:- \nSelect and explain. \nA. Red path, B. Purple path, C. Green path, D. Black path", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Network analysis contain: PE - Programmed evaluation & Review technique - sequence of activities. CPM - Critical pathway method (longest path) Red path - 3+1+3 weeks - 7 weeks - Longest path Purple path - 3 + 2 weeks - 5 weeks Green path - 4+ 2 weeks - 6 weeks Black path - There is nothing like Black path in Image', 'role': 'assistant'}]