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': 'Griffith demonstrated transformation with ? \nSelect and explain. \nA. H. influenzae, B. E. col i, C. Proteus, D. Pneumococcus', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Pneumococcus", 'role': 'assistant'}]