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
Rideal-Walker Coefficient is employed for the assessment of 
Select and explain. 
A. Germicidal Power of a disinfectant, B. Sufficiency of Pasteurisation, C. Effect of Incineration, D. Effect of autoclaving
A: Germicidal Power of a disinfectant
Answer: A: Germicidal Power of a disinfectant 
Explanation: RWC
Also known as ‘Carbolic acid coefficient’.
Is used to ‘represent germicidal power of a disinfectant’.
Standard used for comparison: Phenol (RWC = 1.)
RWC = 10 implies: Given disinfectant is 10 times more potent than phenol.
Organism used for testing: Salmonella typhi
210 In presence of organic matter, RWC is ineffective: Chic Martin test is employed