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: Pathology
Which is not the classical feature of primary myelofibrosis 
Select and explain. 
A. Tear Drop RBCs, B. Leucocrythroblast, C. Abnormal megalcaryocytes, D. Biconcavve RBCs
D: Biconcavve RBCs
Answer: D: Biconcavve RBCs 
Explanation: Solution:
When RBCs are Passing through splenic Circulation and fibrotic area biconcave RBCs becomes Tear Drop RBCs.