Which statement is true about earthworm?

Blood is blue

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Blood is red but haemoglobin is dissolved in plasma

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Blood pigment is haemocyanin

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Blood is red but haemoglobin is dissolved in RBC's

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Solution

The correct option is A Blood is red but haemoglobin is dissolved in plasma
In earthworms, the blood vascular system is of closed type. The blood of earthworm is red and haemoglobin is found dissolved in the blood plasma. RBCs are absent in them. So, the correct answer is option B.

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