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
Side effects of erythropoietin - 
Select and explain. 
A. Hypertension, B. Increased ferritin, C. Thrombocytosis, D. ↓ PO4
A: Hypertension
Answer: A: Hypertension 
Explanation: None