Organisms which synthesise carbohydrates from inorganic compounds using radiant energy are called
(a) decomposers
(b) producers
(c) herbivores
(d) carnivores
(b)
Decomposer is an organism that decomposes, or breaks down, organic material such as the remains of dead organisms.
Organisms which synthesize their own food from inorganic compounds using radiant
energy are called producers or autotrophs e.g., all green plants, blue-green algae etc.
Animals that eat plants exclusively are herbivores, and animals that eat only meat are carnivores.
Therefore option (B) is correct