This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
[{'content': 'The main cause of increased blood flow to exercising muscles is \nSelect and explain. \nA. Raised blood pressure, B. Vasodilatation due to local metabolites, C. Increased sympathetic discharge to peripheral vessels, D. Increased hea rate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: During prolonged exercise blood flow to skeletal muscle will increase up to 20 times this is called exercise hyperemiaThis is made possible by local metabolite induced vasodilationRef: Medical Physiology Indu Khurana 2015 edition, Page No:276', 'role': 'assistant'}]