This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
Sepsis patient with TLC OF 15000, Neutrophil is 40%, Eosinophil 7%, Band cells 15%, Metamyelocytes 5% and Lymphocytes are 35% what is I:T ratio 
Select and explain. 
A. 20%, B. 23%, C. 30%, D. 33%
A: 20%
Answer: A: 20% 
Explanation: Immature to total white blood cells (I:T ratio): Immature cell count-band cells + metamyelocyteNow i/t = 3000/15000 = 1/5 = 20%I:T ratio, CRP, total count are used in diagnosis of infection, NELSON 20th edition