This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper Limb Traumatology, Subject name: Orthopaedics
[{'content': 'Tardy ulnar nerve palsy is seen in ? \nSelect and explain. \nA. Excision of elbow joint, B. Fracture of olecrenon process, C. Cubitus valgus, D. Cubitus varus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Lateral epicondyle Fracture: Leads to tardy ulnar nerve palsy - Cubitus Valgus deformity followed by non-union of lateral epicondyle fracture. Normal carrying angle of the elbow is 5-15deg of valgus More than this or an asymmetry between the 2 sides is regarded as a valgus deformity. Tardy ulnar nerve palsy- Weakness of the hand with numbness or tingling of the ulnar fingers', 'role': 'assistant'}]