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: Anatomy
All are abductors of thigh, EXCEPT? 
Select and explain. 
A. Saorius, B. Piriformis, C. Gluteus minimus, D. Gluteus medius
B: Piriformis
Answer: B: Piriformis 
Explanation: Piriformis helps in lateral rotation of hip and is not a abductor. Gluteus medius, gluteus minimus and saorius are abductors of hip. The hip joint is a ball and socket joint. It has the following normal ranges of movement: Flexion, Extension, Adduction, Abduction, Medial Rotation and Lateral Rotation. There are various muscles which bring about these movements. Hip joint MovementChief musclesAccessory musclesAbductors of hipGluteus mediusGluteus minimusSaoriusTensor fascia lataAdductors of hipAdductor longus, brevis and magnusPectineusGracilisLateral rotators of hipExternus obturatorInternus obturatorsuperior and inferior gemelliQuadratus femorisPyriormisSaoriusGluteus maximusMedial rotators of hipTensor fascia lataGluteus mediusGluteus minimus ExtensorsGluteus maximusHamstrings FlexorsPsoas majorIliacusPectiniusRectus femorisSaoriusAdductor longus