There are different types of leukocytes (also known as white blood cells), such as granulocytes (neutrophils, eosinophils, and basophils), monocytes, and lymphocytes (T cells and B cells).
Each type of white cell has a different function.
Eosinophils' primary function is to fight parasites, although they also respond to allergens.
On the other hand, basophils produce histamine and heparin and are responsible for allergic reactions.
This means the right answer is D) eosinophils
