This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Physiology
[{'content': 'When gases flow through an orifice which factor is least likely to effect turbulence \nSelect and explain. \nA. Density of gas, B. Viscosity of gas, C. Pressure of gas, D. Diameter of orifice', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pressure of the gas is least likely to affect the turbulence Ref: guyton and hall textbook of medical physiology 12 edition', 'role': 'assistant'}]