This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Savlon contains : \nSelect and explain. \nA. Cetrimide and cetavlon, B. Cetrimide and Chlorhexidine, C. Cetrimide, Chlorhexidine and butyl alcohol, D. Cetrimide and butyl alcohol', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Savlon is a very popular disinfectant in the hospitals and it contains chlorhexidine and cetrimide.', 'role': 'assistant'}]