This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'Which one of the following disinfectant is not effective in killing spores? \nSelect and explain. \nA. Alcohol, B. Aldehyde, C. Halogen, D. Phenol', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ethyl and isopropyl alcohols are commonly used as antiseptics and disinfectants.when diluted with water ,they have potent bactericidal,fungicidal,virucidal and tuberculocidal propeies ,but doesnot destro spores.phenol and aldehydes are slowly effective against spores and gram negative bacteria. ref:park&;s textbook,ed 22,pg no 121', 'role': 'assistant'}]