A) Chordata
B) Annelida
C) Mollusca
D) Echinodermata
Correct Answer: C
Solution :
Haemocyanin is a copper containing blue blood pigment found in molluscs and athropods. Haemocyanin has a structure similar to that of haemoglobin but the haem group contains copper instead of iron. When haemocyanin combined with \[{{O}_{2}}\] it becomes blue.
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