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B
Archaebacteria
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C
Eubacteria
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D
Cyanobacteria
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E
Chlorophyceae
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Solution
The correct option is D Cyanobacteria Blue-green algae are also called as Cyanobacteria. The blue colour of blue-green algae is due to presence of pigments phycocyanin and allophycocyanin. The green colour is due to presence of chlorophyll pigment. It also contains phycoerythrin pigment. Phycoerythrin pigment results in the red colour.