In blue-green algae, photosystem-II contains important pigment concerned with photolysis of water. It is
The correct option is C Phycocyanin.
Blue-green algae have the blue-green pigment, phycocyanin that serves as antennae in the photolysis of water at photosystem II and acts as light harvesting complex along with electron carrier. Chlorophyll b is absent in blue-green algae. So, the correct answer is option A.