Answer :

To determine the percentage range that neutrophils account for among white blood cells (WBCs), let's analyze the options given.

Neutrophils are a type of WBC, and different types of WBCs comprise varying percentages of the total white blood cell count. The part of the question we are interested in is identifying which percentage range correctly represents the proportion of neutrophils in a healthy individual's blood.

From the provided information, we find the following options:

a) 50-60%
b) 20-30%
c) 10-20%
d) 2-4%

The goal is to determine which of these percentage ranges is correct for neutrophils.

The correct answer is:
a) 50-60%

Therefore, neutrophils account for 50-60% of the total WBC count in a healthy individual.