a: Producing coagulation factors - This function is associated more with the liver, which produces various clotting factors involved in the coagulation process.b. Destroying dying red blood cells: The spleen is primarily involved in the destruction of old or damaged red blood cells. It acts as a reservoir for blood, where it filters out old or abnormal red blood cells, recycling their components and removing any potentially harmful substances.c: Producing leukocytes before birth - Leukocytes (white blood cells) are primarily produced in the bone marrow, not the spleen.d: Storing glycogen - Glycogen storage is mainly associated with the liver and muscles, not the spleen.