This question asks to match types of white blood cells (List I) with their usual proportion in the blood (List II). The correct matchings are : Eosinophils (A) - typically make up 1-6% of white blood cells, so the best match is (I) 6 - 8% Lymphocytes (B) - typically make up 20-40% of white blood cells, but none of the options are in this range. However, since the other cells have more fitting matches, the remaining percentage (III) 20 - 25% would be the best fit. Neutrophils (C) - these are the most common type of white blood cells, making up 50-70% of all white blood cells, so the best match is (IV) 60 - 65% Monocytes (D) - typically make up 2-8% of white blood cells, so the best match is (II) 2 - 3%