This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gram-Positive Infections - Corynebacterial Infections, Subject name: Anatomy
[{'content': 'Flexor of hip joints are all except- \nSelect and explain. \nA. Psoas major, B. Sartorius, C. Gluteus maximus, D. Rectus femoris', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C. Gluteus maximusMUSCLES PRODUCING MOVEMENTS AT HIP JOINT-a. Flexion- psoas major and iliacus, assisted by pectineus, rectus femoris and sartorius. The adductors, particularly adductor longus, also assist, especially in early flexion following full extension.b. Extension - gluteus maximus and the hamstring (posterior femoral) muscles.c. Abduction - gluteus medius and minimus, assisted by tensor fasciae latae and sartorius; it is limited by adductor tension, the pubofemoral ligament and the medial band of the iliofemoral ligament.d. Adduction -adductors longus, brevis and magnus, assisted by pectineus and gracilis; it is limited when the moving limb contacts the contralateral limb.e. Medial rotation - tensor fasciae latae and the anterior fibres of gluteus minimus and medius.f. Lateral rotation - is produced by the obturator muscles, the gemelli and quadratus femoris, assisted by piriformis, gluteus maximus and sartorius. It is a powerful action which is limited by tension in the medial rotators and the lateral band of the iliofemoral ligament.', 'role': 'assistant'}]