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': 'All the following antibiotics act on the cell wall except- \nSelect and explain. \nA. Ampicillin, B. Bacitracin, C. Cycloserine, D. Griseofulvin', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Griseofulvin", 'role': 'assistant'}]