This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
Best disinfectant of cholera stool is- 
Select and explain. 
A. Bleaching powder, B. Cresol, C. Phenol, D. Lime
B: Cresol
Answer: B: Cresol 
Explanation: Cresol is an excellent coal-tar disinfectant. It is 3 to 10 times as powerful as phenol, yet no more toxic. Cresol is best used in 5 to 20 percent strength for disinfection of farces and urine. Cresol is an all-purpose general disinfectant. (refer pgno :128 park 23 rd edition)