This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Microbiology Pa-2 and Pa-3 (Sterilization and Bacterial Genetics), Subject name: Microbiology
[{'content': 'Phenol Coefficient indicates - \nSelect and explain. \nA. Efficiency of a disinfectant, B. Dilution of a disinfectant, C. Quantity of a disinfectant, D. Purity of a disinfectant', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Phenol coefficient - Efficiency of a disinfectant is compared with that of phenol Greater the phenol coefficient , more will be efficiency of disinfectant.', 'role': 'assistant'}]