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: Physiology
[{'content': 'Which of the following increases turbulence in blood flow: \nSelect and explain. \nA. When the diameter of the blood vessel increases., B. When density decreases., C. When resistance increases., D. All of the above.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Turbulence ∞ Re (Reynolds no) =ρDV/И \nSo increase in density → increases Re → increases turbulence.', 'role': 'assistant'}]