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
Strength of phenol used in disinfecting faeces is: 
Select and explain. 
A. 5%, B. 6%, C. 8%, D. 10%
D: 10%
Answer: D: 10% 
Explanation: Agents used for disinfecting faeces: DISINFECTANT % USED Bleaching powder 5 Phenol 10 Cresol 5 Formalin 10 Ref: Park 21st edition, page 119.