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': 'In which of the following condition is tardy ulnar nerve palsy seen? \nSelect and explain. \nA. Malunited supra condylar fracture, B. Malunited lateral condylar fracture, C. Malunited medial condylar fracture, D. Fracture both bones of forearm', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tardy ulnar nerve palsy may develop after malunited fractures of the lateral humeral condyle in children, displaced fractures of the medial humeral epicondyle, dislocations of the elbow and contusions of the nerve. Tardy ulnar nerve palsy may also develop in patients who have a shallow ulnar groove on the posterior aspect of the medial humeral epicondyle. Complications associated with pediatric lateral condylar fracture include cubitus varus, cubitus valgus, fishtail deformity, and tardy ulnar nerve palsy.', 'role': 'assistant'}]