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': "Posada's fracture is ? \nSelect and explain. \nA. Trascondylar fracture of humerus, B. Fracture lateral condyle of humerus, C. Fracture medial condyle of humerus, D. Fracture anatomical neck of humerus", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Transcondylar fracture of humerus Posada's fracture Transcondylar humeral fracture with displacement of the distal fragment anteriorly and dislocation of the radius and ulna from the bicondylar fragment.", 'role': 'assistant'}]