This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Orthopaedics
Choose the true statement regarding dislocation of hip: 
Select and explain. 
A. Posterior dislocation is the most common type, B. Anterior dislocation is the most common type, C. Central dislocation is the most common type, D. Only anterior dislocation is associated with fracture lip of acetabulum
A: Posterior dislocation is the most common type
Answer: A: Posterior dislocation is the most common type 
Explanation: Ans. A. Posterior dislocation is the most common typeThe posterior dislocation is the most common type of dislocation of hip.There are three main types of dislocations of the hip:* Posterior* Anterior* CentralThe posterior dislocation results from posteriorly directed force to the flexed knee when the hip is also in the flexed position like in car accidents. Patients with an isolated posterior hip dislocation present with hip flexion, adduction, internal rotation, and a shortened extremity.All of the above types of dislocation may be associated with fracture lip of acetabulum.