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': 'Peripheral hea is another name for \nSelect and explain. \nA. Gastrocnemius muscle, B. Soleus muscle, C. Plantaris muscle, D. Popliteus muscle', 'role': 'user'}, {'content': "Answer: B \nExplanation: There are large valveless venous sinuses in the substance of soleus. When it contracts, the blood is pumped out of them and during rest the blood stagnates in them. Soleus is also known as because it actively helps in the venous return from the lower limb. (Ref: Gray's Anatomy, Churchill Livingstone, New York; 2005; 879 - 880.)", 'role': 'assistant'}]