This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
[{'content': 'Which one of the following disinfectant is effective in killing spores - \nSelect and explain. \nA. Alcohol, B. Aldehyde, C. Halogens, D. Phenol', 'role': 'user'}, {'content': "Answer: C \nExplanation: Halogens are potent bactericidal, fungicidal, sporicidal, tuberculocidal, and virucidal. Others are given are only slowly effective against spores. Park's textbook of preventive and social medicine.K Park. Edition 23.Pg no: 128", 'role': 'assistant'}]