NEET BIOLOGY

Detailed explanation-1: -Correct option b Obtain energy from radiations and hydrogen from inorganic compoundsExplanation:Photolithotrophs used light as energy and inorganic electron donor like H2 H2S as hydrogen source.

Detailed explanation-2: -Photolithotrophs manufacture their own organic nutrients from inorganic raw materials (H2, O2) with the help of radiation energy. Chemotrophs are organisms that obtain energy by the oxidation of electron donors in their environments. These molecules can be organic or inorganic.

Detailed explanation-3: -Photolithotrophs such as plants obtain energy from light and therefore use inorganic electron donors such as water only to fuel biosynthetic reactions (e. g., carbon dioxide fixation in lithoautotrophs).

Detailed explanation-4: -Organisms such as Prokaryotes, Bacteria and Archaea, obtain the energy required for metabolism from the oxidation of reduced inorganic compounds such as hydrogen, ammonia, nitrite, sulfide, hydrogen and ferrous ions.

Detailed explanation-5: -Organotrophs, including humans, fungi, and many prokaryotes, are chemotrophs that obtain energy from organic compounds. Lithotrophs (“litho” means “rock”) are chemotrophs that get energy from inorganic compounds, including hydrogen sulfide (H2S) and reduced iron.