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
In leucopenia, which cell type is predominantly involved? 
Select and explain. 
A. Erythrocytes, B. Granulocytes, C. Eosinophils, D. Monocytes
B: Granulocytes
Answer: B: Granulocytes 
Explanation: Leucopenia  
The absolute granulocyte count is particularly low (below 1500/µl) with relative lymphocytosis. The neutrophils are morphologically normal, but their alkaline phosphatase score is high.
Reference:  Textbook of Pathology, Harsh Mohan, 7th ed page no 302