Which of the following oxygen transporter proteins contains copper?

Question

Hemocyanin is the oxygen transporter protein in molluscs and arthropods. It is a copper-containing protein. It is blue in colour when oxygenated and colourless when oxygen is removed.
Vanabins are a specific group of vanadium-binding metalloproteins. Vanabins are found almost exclusively in the blood cells of some tunicates, including the Ascidiacea.
Chlorocruorin is a dichroic red-green respiratory protein. It is chemically similar to haemoglobin, and is only found dissolved in the blood of certain marine annelid It is an iron-containing protein.
Hemerythrin is a non-heme iron protein used by two phyla of marine invertebrates (sipunculids and brachiopods) for oxygen transfer and/or storage.

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Hemocyanin

Hemocyanin is the oxygen transporter protein in molluscs and arthropods. It is a copper-containing protein. It is blue in colour when oxygenated and colourless when oxygen is removed.
Vanabins are a specific group of vanadium-binding metalloproteins. Vanabins are found almost exclusively in the blood cells of some tunicates, including the Ascidiacea.
Chlorocruorin is a dichroic red-green respiratory protein. It is chemically similar to haemoglobin, and is only found dissolved in the blood of certain marine annelid It is an iron-containing protein.
Hemerythrin is a non-heme iron protein used by two phyla of marine invertebrates (sipunculids and brachiopods) for oxygen transfer and/or storage.