This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and Health, Subject name: Social & Preventive Medicine
[{'content': "For hookworm to be a major public health problerr chandler's index should be more than: \nSelect and explain. \nA. 100, B. 200, C. 250, D. 300", 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. (d) 300Ref: K. Park 23rd ed. / 243-44* CHANDLER'S INDEX is also known as Endemic index.* It is defined as average number of hookworm eggs per gram of stool for the entire community.* >300 eggs per gram of stool denotes important public health problem.Interpretation of chandler's index:Average No. of eggs/gm of stoolInterpretation* <200No significance* 200-250Potential danger* 250-300Minor public health problem* >300Major public health problem", 'role': 'assistant'}]