This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Muscles of Lower Limb, Subject name: Anatomy
Medial rotator of thigh at hip joint is 
Select and explain. 
A. Obturator externus, B. Obturator internus, C. Gluteus maximus, D. Gluteus minimus
D: Gluteus minimus
Answer: D: Gluteus minimus 
Explanation: Gluteus medius, Gluteus minimus, Tensor fascia lata (collectively referred to as TRIO muscles)- Medial rotators of thigh Obturator internus, Obturator externus, Gluteus maximus -lateral rotators of thigh.