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
All are true for sickle cell anemia, except - 
Select and explain. 
A. Pulmonary arterial hypertension, B. Fish vertebra, C. Leukopenia, D. Increased size of heart
C: Leukopenia
Answer: C: Leukopenia 
Explanation: None