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
If land is available the best method of sewage disposal is - 
Select and explain. 
A. Dumping, B. Composting, C. Trickling filter, D. Activated sludge process
B: Composting
Answer: B: Composting 
Explanation: Park's textbook of preventive and social medicine 23rd edition. Park's textbook of preventive and social medicine 23rd edition. * Composting is a method of combined disposal of refuse and night soil or sludge where suitable land is available.