This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Gram Positive Bacilli, Gram Negative Bacilli), Subject name: Microbiology
[{'content': 'Which of the following has drum stick appearance? \nSelect and explain. \nA. C. bifermentans, B. C perfringens, C. C tetani, D. C difficile', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Option 1, 2, 3, 4 Location of spores: Most of the clostridia bear a sub-terminal spores except: - C. tetani: Produces spherical and terminal spore (drum stick appearance). Refer to the image given below. - C. teium: Produces oval and terminal spore (tennis racket appearance) - C. bifermentans: Produces central and oval spore.', 'role': 'assistant'}]