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: Surgery
[{'content': 'Empyma is a term given for \nSelect and explain. \nA. Collection of pus in the tissue spaces, B. Collection of blood in the tissue spaces, C. Collection of air in the tissue spaces, D. Collection of serous fluid in the tissue spaces', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]