This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': 'Draughtsman colonies are seen with \nSelect and explain. \nA. Anthrax, B. Pnuemococci, C. Peussis, D. Yersenia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: - REF : ananthanarayana 10th ed Pnuemococci Due to alpha hemolysk, colonies of pneumococci rcsemble colonies of Str. vidans. But on fuher incubation the colonies ofpneumococci become flat with raised edges and central umbonation, so that concentric rings are seen on the surface when viewed from above - draughtsman or Carrom coin appearance.', 'role': 'assistant'}]