Blood of Cockroach has no role in respiration as it does not have

Haemoglobin

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Plasma

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Trehlose

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Haemocytes

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Solution

The correct option is A Haemoglobin
The blood in a cockroach is colourless as there are no respiratory pigments such as haemoglobin. This type of colourless blood without any respiratory pigment is called haemolymph. As the respiratory pigment is absent in blood of cockroach, it does not have any role in respiration.
So, the correct answer is 'Haemoglobin'

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