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: Orthopaedics
Flexion, adduction and internal rotation is characteristic posture in - 
Select and explain. 
A. Anterior dislocation of hip joint, B. Posterior dislocation of hip joint, C. Fracture of femoral head, D. Fracture shaft of femur
B: Posterior dislocation of hip joint
Answer: B: Posterior dislocation of hip joint 
Explanation: None