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
[{'content': 'Which of the following muscle helps in the flexion of hip joint? \nSelect and explain. \nA. Psoas, B. Piriformis, C. Pectoralis major, D. External oblique abdominis', 'role': 'user'}, {'content': "Answer: A \nExplanation: Flexors of hip: Psoas major and illiacus are the chief flexors of hip joint. Pectineus, rectus femoris, adductors and saorius are the accessory muscles. Adductors mainly the adductor longus paicipate in the early stages of flexion. Ref: Snell's clinical anatomy, 7th Edition, Page 611.", 'role': 'assistant'}]