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: Medicine
In a patient with dengue hemorrhagic fever, which of the following is most impoant to monitor? 
Select and explain. 
A. Hemoglobin, B. TLC, C. Platelet count, D. Hematocrit
D: Hematocrit
Answer: D: Hematocrit 
Explanation: Ans: D. Hematocrit(Ref: Harrison 19/e p1319, 1322)In a patient with dengue hemorrhagic fever (DHF), hematocrit is most impoant parameter to monitor. Diagnosis of DHF needs the presence of rise in hematocrit 420% or more i.e. Hemoconcentration.Despite the name, the critical feature that distinguishes DHF from dengue fever is not hemorrhaging, but rather plasma leakage resulting from increased vascular permeability