This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
[{'content': 'Draughtsman colonies are seen in \nSelect and explain. \nA. Staphylococcus, B. Salmonella, C. Pneumococcus, D. Corynebacterium', 'role': 'user'}, {'content': 'Answer: C \nExplanation: (Pneumococcus) (259-P Chakraborty 2nd) (217, 221-Ananthanarayan 7th)* Pneumococci are typically a haemolytic. In prolonged incubation autolysis occurs at central depression (umbonation) of the colony which creates a typical draughtsman or carom coin appearanceDifferentiation between Str. pneumoniae and Strep, viridans Str. pneumoniae Str. viridansMorphologyCapsulated, lanceolate diplococciNoncapsulated, oval or round cells in chainsQuellung testPositive NegativeColoniesInitially dome-shaped later \'draughtsman\' colonies Dome shapedGrowth in liquid mediaUniform turbidity Granular turbidityBile solubilityInvariably positive Invariably negativeInulin fermentationPositive NegativeOptochin sensitivityPositive NegativeIntraperitoneal inoculation in miceFatal infection Non pathogenicC. diphtheriaGravis strainsIntermedius strainsMitis strains* Colonies on Telluriteblood Agar* Haemolysis"Daisy head" coloniesin 48-72 hoursVariable"Frog\'s egg" colonies"Poached egg" coloniesUsually haemolytic Non haemolytic', 'role': 'assistant'}]