Which of the following statements about white blood cells is false? a. neutrophils are granulocytes.
b. eosinophils can phagocytose pathogens.
c. lymphocytes are agranulocytes mostly involved in adaptive immunity.
d. macrophages are granulocytes that phagocytose pathogens

d. Macrophages are granulocytes that phagocytose pathogens

Explanation:

Macrophages are monocytes. Monocytes are agranulocytes, a type of leucocytes (WBC).  They moves out of the blood and goes to the body tissues and reaches to the site of inflammation to clean the debris of neutrophils, debris of pathogens such as virus and bacteria, cell debris after initial neutrophil response. They can also present antigens to unexperienced lymphocytes.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds