This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Clostridium, Subject name: Microbiology
[{'content': 'Which of the following is associated with gas formation in sub cutaneous tissues? \nSelect and explain. \nA. Clostridium, B. Borrelia, C. Staphylococcus, D. Streptococcus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: a) ClostridiumClostridium perfringens is associated with gas gangrene or myonecrosis. These patients have bullous lesions and crepitations of the skin.Staphylococcus can produce subcutaneous emphysema only after the rupture of a pneumatocele (In Staph, pneumonia)', 'role': 'assistant'}]