This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lower Extremity, Subject name: Anatomy
[{'content': 'Biceps femoris does which of the following function? \nSelect and explain. \nA. Adduction of knee, B. Flexion of knee, C. Extension of knee, D. Abduction of knee', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B Flexion of kneeRef: Netters Clinical Anatomy, 3rd ed. pg. 288 1* Biceps femoris is present in posterior compartment of(r) thigh and forms hamstrings. It is responsible for flexion of knee.* The other hamstrings are semitendinosus and semimembranosus. All these muscles originate from the ischial tuberosity and are innervated by tibial part of sciatic nerve (L5, S1 and S2).', 'role': 'assistant'}]