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: Microbiology
[{'content': 'Feces are disinfected best by ? \nSelect and explain. \nA. 1% formaldehyde, B. 5% cresol, C. 5% phenol, D. Isopropyl alcohol', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., 5% cresol "The most effective disinfectant for general use is a coal-tar disinfectant with a Rideal-Walker (RW) coefficient of 10 or more such as cresol".', 'role': 'assistant'}]