This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Humerus Fractures, Subject name: Orthopaedics
[{'content': 'Tardy ulnar nerve palsy seen in? \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: ANSWER: (B) Malunited lateral condylar fractureREF: Apley 8th ed p. 599TARDY ULNAR NERVE PALSY:Seen after fracture of lateral condyleLate complication , may be seen years after the injuryMotor loss occurs first followed by sensory changesCubitus valgus deformity leads to stretching of medial structures including ulnar nerve', 'role': 'assistant'}]