PS II contains a non-chlorophyllous pigment in blue-green algae

β

-carotene

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Zeaxanthin

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Phycocyanin

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Cytochrome c.

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Solution

The correct option is A Phycocyanin
Photosynthetic bacteria are anaerobic and only one type of photosystem is found in them but cyanobacteria or blue-green algae have both systems PSI and PSII. In PS I contain only one chlorophyll that is chlorophyll a while PS II contains various yellowish carotenoids and phycocyanin that differ in colour in different species.
So the correct option is 'Phycocyanin'.

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