This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
Ratio of fat cells and RBC in bone marrow is? - 
Select and explain. 
A. 1:01, B. 2:01, C. 4:01, D. 6:01
A: 1:01
Answer: A: 1:01 
Explanation: Fat cells and RBC ratio is 1:1 Fat to Cell ratio ... should be 1:1 so 1/2 hemopoietic cells and 1/2 are fat cells ... hyperplasia depending on the overall cellularity of the bone marrow. Blasts ... irregular and jagged RBC fragments w/ no central pallor Reference: textbook of Pathology ,7th edition ,18 Harsha Mohan, page number 264 table 10.2