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: Medicine
[{'content': 'Post - translation modification is seen with \nSelect and explain. \nA. Streptomycin, B. Penicillin, C. Sulphonamides, D. Cephalosporins', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]