This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Trauma, Subject name: Surgery
[{'content': '&;Tennis elbow&; is characterized by \nSelect and explain. \nA. Tenderness over the medial epicondyle, B. Tendinitis of common extensor origin, C. Tendonitis of common flexer origin, D. Painful flexion and extension', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .tennis elbow(lateral epicondylitis) characterised by pain and tenderness at the lateral epicondyle of the humerus due to non-specific inflammation of the origin of extensor muscle of the forearm. clinical features-tenderness ,precisely localized to the lateral epicondyle of the humerus.pain is aggravated by putting the extensor tendons to a stretch (Ref: Essential ohopaedics, Maheshwari and Mhaskar,5th edition,pg no. 302)', 'role': 'assistant'}]