Answer:
The correct options are -
picks up oxygen
has an attraction for carbon monoxide
has an iron ion
is found in erythrocytes
Explanation:
Hemoglobin is the iron ion-containing metalloprotein that transports oxygen, present in the red blood cells (erythrocytes) of almost vertebrates. It is was also present in some invertebrates.
Hemoglobin in blood takes oxygen from the lungs or gills and transport to the rest of the body. It was also brought carbon dioxide back to the lungs.
Thus, all options are correct options.