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
Eisenmenger's syndrome is characterized by all except 
Select and explain. 
A. Cyanosis, B. Anemia, C. Pulmonary hypertension, D. Narrow split S2
B: Anemia
Answer: B: Anemia 
Explanation: Polycythemia occurs in eisenmengers syndrome due to increased erythropoietin  produced as a result of increased deoxygenated blood.