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': 'Bakers cyst is a type of \nSelect and explain. \nA. Pulsion diveiculum of knee joint, B. Retention cyst, C. Bursistis, D. Benign tumor', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. Pulsion diveiculum of knee jointIt is the pulsion diveiculum of the knee joint, caused by chronic disease in the joint.Bulging of the posterior capsule and synol herniation may produce a swelling in the popliteal fossa.', 'role': 'assistant'}]