Characteristic pigment of cyanobacteria is

Chlorophyll b

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Fucoxanthin

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Phycocyanin

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Anthocyanin

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Solution

The correct option is D Phycocyanin
Cyanobacteria are also called Blue-Green algae. They are photosynthetic bacteria. They are capable of producing their own food in presence of sunlight. They posses phycocyanin pigment. It is a blue photosynthetic pigment. It is a phycobiliprotein complex produced by cyanobacteria. It is an accessory pigment to chlorophyll.
Thus, the correct answer is 'Phycocyanin.'

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