Which among the following is an autotrophic group?
Anabaena, Nostoc, and angiosperms.
All green plants or members of Kingdom Plantae and cyanobacteria are autotrophs. They can prepare their own food from simple inorganic substances. Anabaena and Nostoc are cyanobacteria and angiosperms [all flowering plants] which come under Kingdom Plantae are autotrophic in nature.