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': 'Medusa head colonies on nutrient agar is seen in? \nSelect and explain. \nA. Pneumococcus, B. Legionella, C. Brucella, D. Anthrax', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Anthrax BACILLUS ANTHRACIS Morphology ? Gram positive Non motile (all other members of genus Bacillus are motile) Arranged singly, in pairs or in sho chains Capsulated - entire chain being surrounded by a capsule. - Capsule is polypeptide Sporing - Spores are formed in culture or in soil but never in animal body during life. Chain of bacilli presents a bamboo stick appearance.", 'role': 'assistant'}]