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
[{'content': 'Rideal-Walker coefficient is related with - \nSelect and explain. \nA. Disinfecting power, B. Parasitic clearance, C. Dietary requirement, D. Statistical correlation', 'role': 'user'}, {'content': "Answer: A \nExplanation: 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", 'role': 'assistant'}]