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': 'The sputum specimen of a 70 year old male was cultured on a 5% sheep blood agar. The culture showed the presence of α-hemolytic colonies next day. The further processing of this organism is most likely to yield - \nSelect and explain. \nA. Gram positive cocci in short chains, catalase negative and bile resistant, B. Gram positive cocci in pairs, catalase negative and bile soluble, C. Gram positive cocci in clusters, catalase positive and coagulase positive, D. Gram negative coccobacilli catalase positive and oxidase positive', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]