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: Biochemistry
[{'content': 'Blood is not a newtonian fluid because: \nSelect and explain. \nA. Viscosity does not changing with velocity, B. Viscosity changes with velolcity, C. Density does not change with velocity, D. Density changes with velocity', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Blood is a non Newtonian fliud. Blood viscosity increases as the velocity decreases. Ref: Biofluid Mechanics By Jagannath Mazumdar, Page 79', 'role': 'assistant'}]