This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'All are motile except? \nSelect and explain. \nA. CI. histolyticum, B. CI. Tetanosporum, C. CI. perfringens, D. CI. septicum', 'role': 'user'}, {'content': "Answer: C \nExplanation: It is a pump Gram-positive bacillus was straight parallel sides and rounded or truncated ends about 4-6 x1 um in size usually occurring singly or in chains or small bundles. It is pleomorphic and filamentous and involution forms are common it is capsulated and nonmotile Ref: Ananthanarayan & paniker's Textbook of Microbiology 9th edition pg no 253", 'role': 'assistant'}]