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: Microbiology
[{'content': 'Transfer of drug resistance in Staphylococcus is by \nSelect and explain. \nA. Transduction, B. Transformation, C. Conjugation, D. Transfection', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Beta-lactamase(penicillinase) inactivates penicillin by splitting beta-lactam ring. Penicillinase is an inducible enzyme and its production is usually controlled by plasmids which are transmitted by transduction or conjugation.', 'role': 'assistant'}]