This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Injuries Around Shoulder, Subject name: Orthopaedics
"Apprehension sign" is seen in dislocation of: 
Select and explain. 
A. Shoulder joint, B. Hip joint, C. Elbow joint, D. Patella
A: Shoulder joint
Answer: A: Shoulder joint 
Explanation: (Shoulder joint) (74-M) (289-Apley's 8th)APPREHENSION TEST - With the patient seated or lying the examiner cautiously lifts the arm into abduction, external rotation, and then extension. At the crucial moment the patient senses that the humeral head is about to slip out anteriorly and his body tautens in apprehension the test should be repeated with the examiners applying pressure to the front of the shoulder with this maneuver, the patient feels more secure and apprehension sign is negative.* Apprehension test-detect anterior instability of the shoulder joint.