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': 'Which of these is not used for the treatment of typhoid ? \nSelect and explain. \nA. Chloramphenicol, B. Ciprofloxacin, C. Ceftriaxone, D. Cefixime', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Cefixime", 'role': 'assistant'}]