The correct option is A Labeo
A. Labeo (the carp) is found in clear and sluggish streams and rivers. It is a herbivorous fish and mainly feeds on phytoplankton and underwater vegetation.
B. Rita fish is a species of catfish. It is a carnivorous fish that feeds on small insects, crustaceans and even dead organic matter.
C. Anabas, known as climbing perch, is a common freshwater fish. It is a carnivorous fish and is fond of eating earthworms.
So, the correct answer is 'Labeo'.