The correct option is D. Chemoautotroph uses CO2 for carbon and H2 for energy.
Explanation:
Autotrophs can be described as organisms that are capable of making their own food. There are two types of autotrophs: photoautotrophs which use energy from the sunlight to produce food and chemoautotrophs have the ability to make biological compounds from inorganic matter.
The chemoautotrophs are capable of taking carbon from inorganic sources and converting them into useful organic compounds. They are also capable of taking hydrogen atoms and use them for deriving energy. Hence, D is the correct answer.
answer is B: autotrophs. in autotrophic nutrition the prokaryotes will use inorganic substance for energy in general it can be divided into photo or chemical autotrophism. the chemical autotrophs use inorganic substance to produce organic substances for energy generation. example of chemical autotrophs include nitrosomonas bacteria and nitrobacter bacteria
