This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
[{'content': 'A microbiologist working with Mycobacteria notes following colonies grow on LowensteinJensen media. Which mycobacteria is he working with? \nSelect and explain. \nA. Mycobacterium bovis, B. Mycobacterium tuberculosis, C. Mycobaterium avium intracellulare, D. Mycobacterium kansasii', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Mycobacterium tuberculosis colonies on LJ medium are dry, rough, raised, irregular colonies with a wrinkled surface, tenacious, difficult to emulsify, creamy white and buff-colored. (Rough, tough, buff). Mycobacterium bovis forms moist, smooth, flat, white colonies on LJ media that break-up easily when touched. Reference: Ananthanarayan and Paniker&;s Textbook of Microbiology Tenth edition', 'role': 'assistant'}]