Chemoautotrophs are those organisms which obtain energy:
from the oxidation of organic electron donors in the presence of light.
solely from the oxidation of inorganic electron donors in the presence of light.
from the oxidation of organic electron donors in the absence of light.
solely from the oxidation of inorganic electron donors in the absence of light.
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Answer is Wrong!
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UPSC Geoscientist – 2020