This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lower limb, Subject name: Anatomy
[{'content': 'True about semitendinosus \nSelect and explain. \nA. Supplied by common peroneal pa of sciatic nerve, B. Proximal fleshy and Distally thin, C. Distal fleshy and Proximally thin, D. Proximal and distal thin but middle pa is fleshy', 'role': 'user'}, {'content': "Answer: B \nExplanation: Semitendinosus - Origin- semitendinosus origins From the inferomedial Into the upper pa of the Tibial pa of ischial tuberosity, in common with the long head of biceps femoris. It is so named because it is muscular in upper pa (fleshy) and has a long tendon of inseion (thin) . It lies posteromedially in the thigh, superficial to the semimembranosus. Inseion- It is inseed into the upper pa of the medial surface of the tibia behind the saorius and the gracilis. nerve supply - tibial pa of sciatic nerve (L5, S1,S2) Ref : B D Chaurasia's Human Anatomy , seventh edition , volume 2 , pg. no.90 ( table no. 7.1 )", 'role': 'assistant'}]