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': 'All the following is a method of sewage disposal except \nSelect and explain. \nA. River outfall, B. Land treatment, C. Oxidation ponds, D. Bangalore method', 'role': 'user'}, {'content': 'Answer: D \nExplanation: OTHER METHODS OF Sewage DISPOSAL. (a) Sea outfall (b) River outfall (c) Land treatment (d) Oxidation ponds (e) Oxidation ditches. Ref: Park 25th edition Pgno : 800', 'role': 'assistant'}]