Place the following in correct developmental sequence:
1. reticulocyte
2. proerythroblast
3. normoblast
4. late erythroblast
A) 1, 2, 3, 4
B) 1, 3, 2, 4
C) 2, 1, 3, 4
D) 2, 4, 3, 1
Answer: D