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
Which is true about the dislocation of hip joint? 
Select and explain. 
A. Posterior dislocation is commoner, B. In posterior dislocation whole lower limb is rotated medially, C. In anterior dislocation whole lower limb is rotated laterally, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Posterior dislocation is the commonest dislocation.
Posterior dislocation has typical deformity of flexion, adduction and internal (medial) rotation.
Anterior dislocation has deformity of flexion, abduction and external (lateral) rotation.