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: Medicine
Blood turbulence is increased in which of the following situations - 
Select and explain. 
A. Multiple myeloma, B. Leukemia, C. Polycythemia, D. Anemia
D: Anemia
Answer: D: Anemia 
Explanation: None