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
[{'content': 'Rideal-Walker Coefficient is employed for the assessment of \nSelect and explain. \nA. Germicidal Power of a disinfectant, B. Sufficiency of Pasteurisation, C. Effect of Incineration, D. Effect of autoclaving', 'role': 'user'}, {'content': 'Answer: A \nExplanation: RWC\nAlso known as ‘Carbolic acid coefficient’.\nIs used to ‘represent germicidal power of a disinfectant’.\nStandard used for comparison: Phenol (RWC = 1.)\nRWC = 10 implies: Given disinfectant is 10 times more potent than phenol.\nOrganism used for testing: Salmonella typhi\n210 In presence of organic matter, RWC is ineffective: Chic Martin test is employed', 'role': 'assistant'}]