This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Anaerobic method of solid waste disposal is- 
Select and explain. 
A. Bangalore method, B. Mechanical composting, C. Controlled tipping, D. Incineration
A: Bangalore method
Answer: A: Bangalore method 
Explanation: * 'Bangalore method' or 'hot fermentation process' is an anaerobic method of composting. * Composting is a method of combined disposal of refuse and night soil. It is a process of nature whereby organic matter breaks down under bacterial action resulting in the formation of humus like material called 'compost', which has manorial value for the soil. * The principal by-products of composting are CO2, H2O and heat. The two methods of composting generally used are- 1) Bangalore method (Anaerobic method). 2) Mechanical composting (Aerobic method). * Compost contains few or no disease producing organisms and is a good soil builder, containing small amounts of nitrates and phosphates which are major plant nutrients.