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: Orthopaedics
[{'content': 'Tardy ulnar nerve palsy caused by -a) Supracondylar #b) Lateral condylar #c) Olecranon #d) Intercondylar #e) Distal radio-ulnar dislocation \nSelect and explain. \nA. ac, B. a, C. ab, D. bc', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Causes of tardy ulnar nerve palsy are :\xa0\n\n\nMalunited lateral condyle humerus fracture (cubitus valgus)\xa0\nDisplaced medial epicondyle humerus fracture\nCubitus varus deformity (due to supracondylar fracture humerus)\nElbow dislocation\nContusions of ulnar nerve\nShallow ulnar groove\nHypoplasia of humeral trochlea\nJoint deformity after prolonged arthritis of elbow', 'role': 'assistant'}]