This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Embryology, Subject name: Anatomy
Which of the following is medial rotators of thigh: 
Select and explain. 
A. Pyrifomis, B. Quadratus femoris, C. Gluteus maximus, D. Gluteus medius
D: Gluteus medius
Answer: D: Gluteus medius 
Explanation: Ans. d. Gluteus mediusMuscles of the gluteal regionMuscleActionPyrifomisRotates thigh laterallyQuadratus femorisRotates thigh laterallyObturator internusAbducts and rotates thigh laterallyGluteus mediusAbducts and rotates thigh medially, stabilizes pelvisGluteus maximusExtends and rotates thigh laterallyGluteus minimusAbducts and rotates thigh mediallySuperior gemellusRotates thigh laterallyTensor fasciae lataeFlexes, abducts, and rotates thigh mediallyInterior gemellusRotates thigh laterally