Multiple choice Leucopenia is the condition in which the total number of leucocytes decreases below 5000/cu mm bone marrow is destroyed leucopoiesis stops the total number of leucocytes increases above 6000/cu mm leucocytes show abnormal phagocytosis Reveal answer Fill a bubble to check yourself A Correct answer Explanation In leucopenia, the total number of leucocytes decreases below 5000/cu mm. Lowering in the total count (TC) and differential count (DC) of WBC results into leucopenia.