What is the difference between granulocytes and agranulocytes?

a. granulocytes are red blood cells, agranulocytes are white blood cells
b. granulocytes have granules, agranulocytes does not
c. granulocytes are in the muscles, agranulocytes are in the bladder
d. granulocytes transport oygen, agranuloctyes defend against diseases

b. granulocytes have granules, agranulocytes do not