The correct option is C A is true but R is false.
Algae are mostly aquatic. They may be unicellular or multicellular and they are autotrophic. They contain chlorophyll which helps them to produce their own food through a process known as photosynthesis. It belongs to the kingdom Plantae.
Monera is a kingdom that contains unicellular organisms with a prokaryotic cell organization, such as cyanobacteria.