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: Social & Preventive Medicine
Controlled tipping is used as a disposal method for which of the following? 
Select and explain. 
A. Sewage, B. Sullage, C. Refuse, D. Human excreta
C: Refuse
Answer: C: Refuse 
Explanation: Controlled tipping or sanitary landfill is the most satisfactory method of refuse disposal when suitable land is available. 3 methods used in this are trench method, ramp method and area method. Composting is a method of combined disposal of refuse and night soil or sludge.