This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Chander&;s index i s- \nSelect and explain. \nA. No. Of eggs \\/ gm of stool, B. No. Of larvae \\/ 100g of stool, C. No. Of larvae \\/ gm of stool, D. No. Of eggs \\/ 100g of stool', 'role': 'user'}, {'content': 'Answer: A \nExplanation: <p> Chandlers index is calculated as number of hookworm eggs per gram feces. Reference:Park&;s textbook of preventive and social medicine,K.Park,21st edition,page no:221 ,22nd edition,pg no.221. <\\p>', 'role': 'assistant'}]