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: Physiology
Which of the following cell type is not a precursor of erythrocyte: 
Select and explain. 
A. Proerythroblast, B. Normoblast, C. Reticulocyte, D. Myeloblast
D: Myeloblast
Answer: D: Myeloblast 
Explanation: None