This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'Cetrimide is \nSelect and explain. \nA. Aldehyde, B. Halogen, C. Phenol, D. Quaernary ammonium compounds', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Cetrimide is Quaernary ammonium compounds. Lysol, Cresol derivatives of coal tar are a type of phenols Formaldehyde and glutaraldehyde are aldehydes Iodine and chlorine are halogens Ref : Ananthanarayana textbook of Microbiology 9th edition Pgno : 33', 'role': 'assistant'}]