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: Pathology
[{'content': 'Streptococcus pneumonia is ? \nSelect and explain. \nA. Gram + diplococci, B. Intracellular gram + diplococci, C. Extracellualr gram –ve diplococcic, D. Gram positive lanceolate diplococcic', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]