Blue green algae are stored in___?

Correct option is B

Blue-green algae, also known as Cyanobacteria, were historically classified as plants due to their ability to perform photosynthesis. However, they are now classified as bacteria and belong to the kingdom Monera. But traditionally, since they perform photosynthesis, they were stored in Plantae. It is important to note that recent classification has moved them to Monera.