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Which of the following statements is correct ?

A. Blood of earthworm is blue in colour

B. Blood pigment of earthworm is haemocyanin

C. Blood pigment of earthworm is red and haemoglobin is dissolved in plasma

D. Blood of earthworm is red and haemoglobin is dissolved in RBC

Please do not use chat terms. Example: avoid using "grt" instead of "great".