This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Microbiology
Rideal-Walker coefficient is related with - 
Select and explain. 
A. Disinfecting power, B. Parasitic clearance, C. Dietary requirement, D. Statistical correlation
A: Disinfecting power
Answer: A: Disinfecting power 
Explanation: Ans. is 'a' i.e., Disinfecting power Determining the efficiency of a disinfectants1. Rideal walker test* Phenol is taken as the standard -> Phenol coefficient2. Chick martin test