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': 'Subterminal spores are found in \nSelect and explain. \nA. Clostridium perfringens, B. Clostridium tetani, C. Clostridium difficile, D. Clostridium teium', 'role': 'user'}, {'content': "Answer: A \nExplanation: The shape and position of spores vary in different species and these are of use in identifying and classifying clostridia.subterminal spores are seen in clostridium perfringens,the bacillus appearing club shaped Ref:anantnarayan and paniker's microbiology 10th edition", 'role': 'assistant'}]