This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood, Subject name: Medicine
These types of RBCs are seen in which condition? 
Select and explain. 
A. Hereditary spherocytosis, B. CRF, C. Myelofibrosis, D. Myelodysplastic syndrome
B: CRF
Answer: B: CRF 
Explanation: Ans. B. CRFBurr cells are seen in CRF. In this RBCs have shell-like appearance. In CRF hyper-segmentation of the neutrophil nucleus are also seen.